Get Abbreviation

Get abbreviation of a given name entered by user in C Programming language by Project Free TV . 

#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char name[100];
    int i=0;
    header();
    system("pause");
    system("cls");
    printf("Enter Name : ");
    gets(name);
    system("cls");
    printf("You have entered %s ",name);
    printf("\n\n\n\t\tAbbreviation");
    printf("\n\n\t\t     %c",name[i]);
    for(i=0;name[i]!='\0';i++)
    {
        if (name[i]==' ')
        {
            i++;
            printf("%c",name[i]);

        }
    }
printf("\n\n\n\n");
}

Strings Swapping using pointers , malloc() & strcpy()

We know that to swap two numbers in c programming language is much easy but can we swap two strings? Of course you can perform swapping on strings as well. The following program swap two strings using pointers, malloc() and strcpy().

#include<stdio.h>
#include<string.h>
#include<malloc.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char s1[100],s2[100];
    char *hold;
    header();
    system("pause");
    system("cls");
while (!feof(stdin))
{
    printf("Enter String 1 : ");
    gets(s1);
    printf("\nEnter String 2 : ");
    gets(s2);
    hold=malloc(0); //is used to provide memory for pointer *hold
    strcpy(hold,s1);
    strcpy(s1,s2);
    strcpy(s2,hold);
    printf("\n\n After Swapping \n\n ");
    printf(" String 1 : %s  ; String 2 : %s \n\n\n\n",s1,s2);
}
}

Functions to calculate string length using arrays

There are many programs in which we need to calculate the length of a string. To calculate string length we can use built in function in C Programming to calculate length but we should know what is going on in back end of this function or what is the structure of this function? The following code defines the structure of function used to calculate the length of a string.

#include<stdio.h>
int strln(char a[])
{
   int i;
   for(i=0;a[i]!='\0';i++);
   return i;

}
int main()
{
   int a[100000];
   puts("Enter String : ");
   gets(a);
   system("pause");
   system("cls");
   printf("\n\n\nString Length is %d \n\n\n\n\n",strln(a));
}

Function to copy one string into another using pointers

To copy one string to another string, we have built-in function defined in <string.h> library but to be a good programmer, we should have knowledge about the algorithm of function and the story of back end code. The following code is the implementation of function to copy one string into another using pointers in C Programming Language.


#include<stdio.h>
void strcp(char *a , char *b)
{
    int i;
    for(i=0;*b!='\0';i++)
    {
        *a=*b;
         a++;
         b++;

    }
}
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char a[100];
    char b[100];
    header();
    system("pause");
    system("cls");
    puts("Enter String 1: ");
    gets(a);
    puts("Enter String 2 : ");
    gets(b);
    strcp(a,b);
    printf("\nAfter Copying String 2 in String 1 \n\n");
    printf("String 1 is : %s \n\n\n\n\n",a);
}

String Comparison using pointers , functions , loops and if selection statements

You can comparison two strings in C Programming language by using built-in function defined in <String.h>. The back end code working behind the function in <String.h> library to comparison two strings works as follows:

#include<stdio.h>
int stcp(char *a , char *b)
{
    int i;
    while(*a==*b)
    {
        if (*a=='\0' || *b=='\0')
        break;
        a++;
        b++;

    }
    if (*a=='\0' && *b=='\0')
        return 0;
    else return -1;
}
int main()
{
    char a[20],b[20];
    printf("Enter String 1 : ");
    scanf("%s",a);
    printf("Enter String 2 : ");
    scanf("%s",b);
    if(stcp(a,b)==0)
    {
        printf("String 1 = String 2");
    }
    else if (stcp(a,b)==-1)
    {
        printf("String 1 is not matching string 2");
    }
}

String Addition using pointers, functions and loop

String concatenation is a way to add two strings. For example if we have two strings "My" and "Name" then to produce these two strings as one string that is "My Name", we will concatenate these two strings. We can do concatenation in C Programming Language by using built-in string concatenation function defined in <String.h> library but we can also make our own function to concatenate two strings. The following code do concatenation of two strings using pointers, functions and loops.

#include <stdio.h>
#include<conio.h>

void concatenate_string(char*, char*);

int main()
{
    char original[100], add[100];

    printf("Enter source string\n");
    gets(original);

    printf("Enter string to concatenate\n");
    gets(add);

    concatenate_string(original, add);

    printf("String after concatenation is \"%s\"\n", original);
 getch();
    return 0;
}

void concatenate_string(char *original, char *add)
{
   while(*original)
      original++;

   while(*add)
   {
      *original = *add;
      add++;
      original++;
   }
   *original = '\0';
}

printing spaced letters in a string like ABC to A B C

#include<stdio.h>
#include<conio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char a[30]={0};
    int i;
    header();
    system("pause");
    system("cls");
    printf("Enter String : ");
    scanf("%s",a);
    printf("\n");
    for(i=0;a[i]!='\0';i++)
    {
        printf(" %c ",a[i]);
    }
    printf("\n\n\n\n");
    getch();

}

Distinguish between vowels and consonants in strings

#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char name[100]={0};
    printf("Enter String : ");
    scanf("%[^aeiou]",name);
    printf("\n%s",name);
}

Search vowels in a string

#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char name[100]={0};
    header();
    system("pause");
    system("cls");
    printf("Enter String : ");
    scanf("%[aeiou]",name);
    printf("\n%s",name);
}

Reversing String

#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    char name[30];
    int i,j;
    header();
    system("pause");
    system("cls");
    printf("Enter String : ");
    gets(name);
    printf("You have Entered : ");
    for(i=0;name[i]!='\0';i++)
    printf("%c",name[i]);
    printf("\n\n\n");
    for(i=0;name[i]!='\0';i++);
    printf("String Length : %d ",i);
    printf("\n\n\n");
    printf("Reversed String is : ");
    for(j=i;j>=0;j--)
    printf("%c",name[j]);
    printf("\n\n\n");
}

gets() and puts() function in String

#include<stdio.h>
int main()
{
    char c1[100];
    puts("Enter String : ");
    gets(c1);
    printf("You Have Entered : %s",c1);

}

Get String and Print string

#include<stdio.h>
int main()
{
  char c1[100],c2[100],c3[100],c4[100];
  puts("Enter Name of 1st City : ");
  gets(c1);
  puts("Enter Name of 2nd City : ");
  gets(c2);
  puts("Enter Name of 3rd City : ");
  gets(c3);
  puts("Enter Name of 4th City : ");
  gets(c4);
  printf("\n\n\n\n\n");
  puts(c1);
  puts(c2);
  puts(c3);
  puts(c4);

}

//Exercise 1: Write a C Program to create the data for some students
//(roll, name, mark1, mark2, mark3, term mark) and then find the total
//marks for each student and average mark of each student.
#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
struct student
{
    int rollno;
    char name[500];
    float mark1;
    float mark2;
    float mark3;
    float term_mark;
    float total;
    float average;
}st;
int main()
{
    header();
    system("pause");
    system("cls");
    printf("Enter Roll No.   : ");
    scanf("%d",&st.rollno);
    fflush(stdin);
    printf("\nEnter Name       : ");
    gets(st.name);
    printf("\nEnter Marks 1    : ");
    scanf("%f",&st.mark1);
    printf("\nEnter Marks 2    : ");
    scanf("%f",&st.mark2);
    printf("\nEnter Marks 3    : ");
    scanf("%f",&st.mark3);
    printf("\nEnter Term Marks : ");
    scanf("%f",&st.term_mark);
    system("cls");
    fflush(stdin);
    printf("Name         : %s ",st.name);
    printf("\nMarks 1      : %.2f",st.mark1);
    printf("\nMarks 2      : %.2f",st.mark2);
    printf("\nMarks 3      : %.2f",st.mark3);
    printf("\nTerm Marks   : %.2f",st.term_mark);
    st.total=0;
    st.total=st.mark1+st.mark2+st.mark3+st.term_mark;
    st.average=0;
    st.average=st.total/4;
    printf("\nAverage      : %.2f",st.average);
    printf("\nTotal        : %.2f ",st.total);
    printf("\n\n\n");
    return 0;
}

Getting and Printing Data using structs and pointers together

#include<stdio.h>
struct student
{
    int rollno;
    char name[100];
    float marks[5];
    float average;
}s[20];
void get(struct student *a)
{
    int i;
    float j=0.0;
    printf("Enter Roll No. of Student : ");
    scanf("%d",&a->rollno);
    printf("Enter Name of Student : ");
    fflush(stdin);
    scanf("%s",&a->name);
    for(i=0;i<5;i++)
    {
       printf("Enter Marks of %d Subject : ",i+1);
       scanf("%f",&a->marks[i]);
    }
    for(i=0;i<5;i++)
    {
       j+=a->marks[i];
    }
    a->average=j/5;

}
void print(struct student *a)
{
    int i;
    printf("\nRoll No : %d",a->rollno);
    printf("\nName    : %s",a->name);
    for(i=0;i<5;i++)
    {
       printf("\nMarks of Subject %d : %.2f ",i+1,a->marks[i]);
    }

    printf("\nAverage : %.2f ",a->average);

}
int main()
{
    int i;
    for(i=0;i<2;i++)
    {
       get(&s[i]);
    }
    for(i=0;i<2;i++)
    {
        if(s[i].average>70)
        print(&s[i]);
    }
}

Getting and Printing Data using structs

#include<stdio.h>
struct account
{
    char name[100];
    int balance;
}ac;
void get(struct account *a)
{
    printf("Enter Name : ");
    fflush(stdin);
    scanf("%s",&a->name);
    printf("\nEnter Account Balance : ");
    scanf("%d",&a->balance);
}
void print(struct account *b)
{
    printf("Name : %s",b->name);
    printf("\nBalance : %d",b->balance);
}
int main()
{
    get(&ac);
    print(&ac);
}

Changes 'a' & 'b' to '-' in file using file handling

#include<stdio.h>

int main()
{
FILE *p1, *p2;
char f1[20], f2[20];
char ch;

printf("Enter File name which has to be copied: ");
gets(f1);
p1=fopen(f1,"r");

if(p1==NULL)
{
    printf("\nUnable to open %s",f1);
    return 1;
}

printf("Enter Destination file");
gets(f2);
p2=fopen(f2,"w");

if(p2==NULL)
{
    printf("Cannot open %s",f2);
    return 1;
}

while((ch=fgetc(p1))!=EOF)
{
    if(' ' || 'a' || 'b')
        ch='-';
    fputc(ch,p2);
}
printf("Completed");
fclose(p1);
fclose(p2);
return 0;
}

Calculate 'A' , 'B' & ' space ' in created file

#include<stdio.h>

int main()
{
FILE *p1,*p2,*p3;
char f1[20], f2[20],f[30];
char ch;
int count1=0,count2=0,count3=0;
printf("Enter File name which has to be copied:  ");
gets(f1);
p1=fopen(f1,"r");

if(p1==NULL)
{
    printf("\nUnable to open %s",f1);
    return 1;
}

printf("\nEnter Name of File in which you want to copy Data :   ");
gets(f2);
p2=fopen(f2,"w");

if(p2==NULL)
{
    printf("Cannot open %s",f2);
    return 1;
}
rewind(p1);
while((ch=fgetc(p1))!=EOF)
{
    if(ch=='A' || ch=='a')
    {
        count1++;
    }

    if(ch=='b' || ch=='B')
    {
        count2++;
    }
    if(ch==' ')
    {
       count3++;
    }
    fputc(ch,p2);
}
printf("a = %d  ,b = %d , space = %d",count1,count2,count3);
printf("\n\nData of File 1 Has been copied to File 2\n\n\n");
fclose(p1);
fclose(p2);
return 0;
}

Creating File & Writing data in file

//Exercise 1: Write a C Program to open a file named “DATA” and write a line of text in it by reading the text from the keyboard.
#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");

}
int main()

{
    FILE *f;
    char a[500];
   header();
   system("pause");
   system("cls");
    f=fopen("DATA.txt" , "w");
    if (f==NULL)
    {
        printf("\nUnable to Open File ....!!");
        return 1;
    }
    printf("\nEnter any Line to Write in File : ");
    gets(a);
    while(!feof(stdin))
    {
        fprintf(f,"%s",a);
        printf("\nEnter any Line to Write in File Ctrl + Z to exit the program : ");
        gets(a);
    }
    fclose(f);
    printf("\nFile Has been created Successfully....!!!\n\n\n\n");

}

Key Search in File Handling

#include<stdio.h>
#include<string.h>
int main()
{
    FILE *f,*e;
    char a[100];
    int roll;
    char key[100];
    f=fopen("abc.dat" , "w");
    if (f==NULL)
    {
        printf("\nUnable to Open File....!!!");
        return 1;
    }
    printf("\nEnter any Text to Write in File : ");
    gets(a);
    fflush(stdin);
    printf("\nEnter Roll No. : ");
    scanf("%d",&roll);
    while(!feof(stdin))
    {
        fprintf(f,"%s %d\n",a,roll);
        printf("\nEnter any Text to Write in File : ");
        fflush(stdin);
        gets(a);
        printf("\nEnter Roll No. : ");
        scanf("%d",&roll);
    }
    fclose(f);
    e=fopen("abc.dat" , "r");
    if (e==NULL)
    {
        printf("\nUnable to Open File....!!!!");
        return 1;
    }
    printf("\n\nEnter key : ");
    gets(key);
    fscanf(e,"%s%d",a,&roll);
    while(!feof(e))
    {
       if (strcmp(key,a)==0)
       {
            printf("%s %d",a,roll);
       }
       fscanf(e,"%s%d",a,&roll);
    }
    fclose(e);
}

//Exercise 2: Write a C Program to read the contents of file ‘File1’ and paste the contents at the beginning of another file ‘File2’ without taking help of any extra file.
#include<stdio.h>
void header()
{
   printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
   printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}

int main()
{
    FILE *a,*b;
    char f_1[100],f_2[100],ch;
    header();
    system("pause");
    system("cls");
    a=fopen("source.txt" , "w");
    if(a==NULL)
    {
        printf("\nOooppsss Unable to Open.....!!!");
        return 1;
    }
    printf("Write any text in File or Ctrl+Z to Exit the Program : ");
    gets(f_1);
    while(!feof(stdin))
    {
        fprintf(a,"%s",f_1);
        gets(f_1);
    }
    fclose(a);
    printf("\n\nEnter the name of Source File : ");
    gets(f_1);
    a=fopen(f_1 , "r");
    if (a==NULL)
    {
        printf("\nOooppsss .... Unable to Open the File....!!!");
        return 1;
    }
    printf("\n\nEnter the name of Target File in which you want to copy the Data :  ");
    gets(f_2);
    b=fopen(f_2,"w");
    if(b==NULL)
    {
        printf("\nOoooOOoopsss... Unable to Open the File....!!!");
        return 1;
    }
    while(!feof(a))
    {
        ch=fgetc(a);
        putc(ch,b);
    }
    fclose(a);
    fclose(b);
    printf("\n\n\t\tCongratulations....!!!!");
    printf("\n\n\t\tFile Has Been Copied Successfully...!!!\n\n");

}

Calculating Spaces Lines Words Letters

//Exercise 3: Write a C Program to count the number of characters, words, lines, spaces and tabs in the input supplied from a file.
#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");

}
int main()
{
    FILE *f,*e;
    char a[500],ch;
    int chr=0,sp=0,words=0,lines=0,tabs=0;
    header();
    system("pause");
    system("cls");
     f=fopen("abc.txt" , "w");
    if(f==NULL)
    {
        printf("\nUnable to Open File...!!");
        return 1;
    }
    printf("\nWrite on File or CTRL+Z to exit : ");
    gets(a);
    while(!feof(stdin))
    {
        fprintf(f,"%s\n",a);
        gets(a);
    }

    fclose(f);
    e=fopen("abc.txt" , "r");
    if(e==NULL)
    {
        printf("\nUnable to Open File...!!");
        return 1;
    }
    rewind(e);
    while((ch=fgetc(e))!=EOF)
    {
         if (ch>='A' || ch>='a' && ch<='z' || ch<='Z')
         {
             chr++;
         }
         if(ch==' ')
         {
             sp++;
             words++;
         }
         if(ch=='\t')
         {
             tabs++;
             words++;
         }
         if(ch=='\n')
         {
             lines++;
             words++;
         }
    }
    printf("\nCharacters : %d\nSpaces : %d \nWords : %d\nLines : %d\nTabs : %d ",chr,sp,words,lines,tabs);
}

Write a program to declare an integer array of 50 elements. A. Write a function getArray() to get array input from the user that will be used to initialize the first thirty five (35) elements of the array by getting input from the user. The rest of the 15 entries would be set to zero (0). B. Write a function FindEven() to find the total numbers of even numbers in the given array. C. Write a function ModifyArray() to make the each array element to a multiple of four(04). D. Write a function named ‘FindMin()’ that will find the smallest element in the given array and return the smallest element.

Write a program to declare an integer array of 50 elements.  
A. Write a function getArray() to get array input from the user  that will be used to initialize the first thirty  five (35) elements of the array by getting input from the user. The rest of the 15 entries would be set to zero (0).  
B. Write a function FindEven() to find the total numbers of even numbers in the given array.
C. Write a function ModifyArray() to make the each array element to a multiple of four(04).
D. Write a function named ‘FindMin()’ that will find the smallest element in the given array and return the smallest element.

#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
void getArray(int a[])
{
    int i;
    for(i=0;i<35;i++)
    {
        printf("Enter %d Number : ",i+1);
        scanf("%d",&a[i]);
        printf("\n");
    }
    printf("\nYou Array's Elements are");
    for(i=0;i<50;i++)
    printf(" %d ",a[i]);
}
void even(int a[])
{
    int i;
    for (i=0;i<35;i++)
    {
        if (a[i]%2==0)
        printf("%d is Even\n",a[i]);
    }
}
int multiply(int a[])
{
    int i;
    for(i=0;i<35;i++)
    {
        printf("%d X 4 is %d\n",a[i],a[i]*4);
    }
}
int FindMin(int a[])
{
    int i,j,hold;
    for(j=0;j<35;j++)
    {
         for(i=0;i<35-1;i++)
         {
              if (a[i]>a[i+1])
              {
                  hold=a[i];
                  a[i]=a[i+1];
                  a[i+1]=a[i];
              }
         }
    }
        printf(" Minimum Number You have Entered is  %d ",a[0]);
        printf("\n\n\n\n\n");
}
int main()
{
    int a[50]={0},i;
    header();
    system("pause");
    system("cls");
    getArray(a);
    system("pause");
    system("cls");
    even(a);
    system("pause");
    system("cls");
    multiply(a);
    system("pause");
    system("cls");
    FindMin(a);
}

Write a program to declare an integer array of 50 elements which gets 35 numbers from user and print rest of 15 as ZEROS.

//Exercise 1:Write a program to declare an integer array of 50 elements.
//A. Write a function getArray() to get array input from the user  that will be used to initialize the first thirty  five (35) elements of the array by getting input from the user. The rest of the 15 entries would be set to zero (0).
#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
int main()
{
    int a[50]={0},i;
    header();
    system("pause");
    system("cls");
    for(i=0;i<35;i++)
{
     printf("%d Number : ",i+1);
     scanf("%d",&a[i]);
     printf("\n");
}
    for(i=0;i<50;i++)
    printf(" %d ",a[i]);
    getch();
}

Exercise 1: Write a C Program to create the data for some students (roll, name, mark1, mark2, mark3, term mark) and then find the total marks for each student and average mark of each student.

//Exercise 1: Write a C Program to create the data for some students
//(roll, name, mark1, mark2, mark3, term mark) and then find the total
//marks for each student and average mark of each student.
#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");
}
struct student
{
    int rollno;
    char name[500];
    float mark1;
    float mark2;
    float mark3;
    float term_mark;
    float total;
    float average;
}st;
int main()
{
    header();
    system("pause");
    system("cls");
    printf("Enter Roll No.   : ");
    scanf("%d",&st.rollno);
    fflush(stdin);
    printf("\nEnter Name       : ");
    gets(st.name);
    printf("\nEnter Marks 1    : ");
    scanf("%f",&st.mark1);
    printf("\nEnter Marks 2    : ");
    scanf("%f",&st.mark2);
    printf("\nEnter Marks 3    : ");
    scanf("%f",&st.mark3);
    printf("\nEnter Term Marks : ");
    scanf("%f",&st.term_mark);
    system("cls");
    fflush(stdin);
    printf("Name         : %s ",st.name);
    printf("\nMarks 1      : %.2f",st.mark1);
    printf("\nMarks 2      : %.2f",st.mark2);
    printf("\nMarks 3      : %.2f",st.mark3);
    printf("\nTerm Marks   : %.2f",st.term_mark);
    st.total=0;
    st.total=st.mark1+st.mark2+st.mark3+st.term_mark;
    st.average=0;
    st.average=st.total/4;
    printf("\nAverage      : %.2f",st.average);
    printf("\nTotal        : %.2f ",st.total);
    printf("\n\n\n");
    return 0;
}

//Exercise 3: Write a C Program to count the number of characters, words, lines, spaces and tabs in the input supplied from a file.

//Exercise 3: Write a C Program to count the number of characters, words, lines, spaces and tabs in the input supplied from a file.
#include<stdio.h>
void header()
{
    printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
    printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");

}
int main()
{
    FILE *f,*e;
    char a[500],ch;
    int chr=0,sp=0,words=0,lines=0,tabs=0;
    header();
    system("pause");
    system("cls");
     f=fopen("abc.txt" , "w");
    if(f==NULL)
    {
        printf("\nUnable to Open File...!!");
        return 1;
    }
    printf("\nWrite on File or CTRL+Z to exit : ");
    gets(a);
    while(!feof(stdin))
    {
        fprintf(f,"%s\n",a);
        gets(a);
    }

    fclose(f);
    e=fopen("abc.txt" , "r");
    if(e==NULL)
    {
        printf("\nUnable to Open File...!!");
        return 1;
    }
    rewind(e);
    while((ch=fgetc(e))!=EOF)
    {
         if (ch>='A' || ch>='a' && ch<='z' || ch<='Z')
         {
             chr++;
         }
         if(ch==' ')
         {
             sp++;
             words++;
         }
         if(ch=='\t')
         {
             tabs++;
             words++;
         }
         if(ch=='\n')
         {
             lines++;
             words++;
         }
    }
    printf("\nCharacters : %d\nSpaces : %d \nWords : %d\nLines : %d\nTabs : %d ",chr,sp,words,lines,tabs);
}

//Name Arslan ud Din Shafiq
//Reg.No. DDP-SP14-BSE-005
//Section A
//Assignment # 3
//Submitted to Sir A.K.Shahid
//COMSATS Institute of Information Technology, Lahore, Pakistan
#include<stdio.h>  //hearder file for I/O

char a[3][3]={0},i,j;           //a 2D array of 3X3 is globally declared and initialized to zero so that it doesn't give any junk value, variable i and j are also globally declared. They are declared globally so that they can be used throughout the program.
void header();                  //prototype of header funtion
void name(char *pt1,char *pt2); //prototype of name function
void filled();                  //prototype of filled funtion
int condition1();               //prototype of condition1 funtion
int condition2();               //prototype of condition2 funtion
int win1();                     //prototype of win1 funtion
int win2();                     //prototype of win2 funtion
void toe();                     //prototype of toe funtion
void print1();                  //prototype of print1 funtion
void design();                  //prototype of design funtion
void gameloading();             //prototype of gameloading funtion
struct std                  //data structure is declared as std
{
     int ch;               //object of data structure
     char s1[100],s2[100]; //character type object declaration in data structure
}st;
int main()                 //main funtion
{
    int menu;              //declaring menu variable

     header();            //calling header funtion
    system("pause");     //to pause screen                                    
    again:               //pointing for goto statement
 gameloading();               //loading funtion is called
    printf("\n\n\n\n\n\n\n\n\n\t\t\t1. Start Game\n\n\t\t\t2. Exit \n\t\t\t");
    menu=getche()-48;      //getting integer value from user
    system("cls"); //clearing screen

     switch(menu) //switch selection statement is applied on menu
{
    case 1: //first case for selection statement
        if(menu==1) //if user press 1 then game is started
        design(); //design() funtion is called
        break; //break statement for case 1
    case 2:
        if(menu==2) //if user select 2 then game is exited
            return 0; //terminating condition
        break;
    default:   //if user select any option except 1 and 2 then default condition is performed
        printf("\n\n\nYou have Selected Wrong Option.");
        printf("\n\n\n\n\n\n");
        system("pause"); //pausing screen
        system("cls"); //clearing screen
        goto again; //if default condition is performed this statement goes to again pointing value.
        break;
}

}
void header()       //a function which does not return any value used to show header file in main function
{
       printf("\n\t\t\t    TIC TAC TOE");                  //printf statement is used for printing & \n for next line and \t for tab or space
       printf("\n\n\n\n\n\n\n\t\tBUILT AND DESIGNED BY >> ARSLAN UD DIN SHAFIQ\n\n\t\tWebsite>>\twww.CWorldbyAS.blogspot.com\n");
       printf("\n\t\tCOMSATS Institute of Information Technology,\n\n\t\t\t\t\t  Lahore , Pakistan\n\n\n");

}
void name(char *pt1,char *pt2)    //pointer funtion which gets the name of user and pass the address where it called
{
      puts("\n\n\t\t\tEnter Name of Player 1 : ");         //asking player 1 to enter name ...puts is used to print string
      printf("\n\t\t\t");
      gets(pt1);                                           //gets is used to get the string from user
      puts("\n\n\t\t\tEnter Name of Player 2 : ");         //asking player 2 to enter name
      printf("\n\t\t\t");
      gets(pt2);                                          //getting name of 2nd player
}
void filled()                                             //a function which tell us about the already filled box
{
      condition1();                                       //it checks the conditions given in funtion condition1() and decrement of i-- is used to identify is the box already filled
      i--;
      printf("\n\n\n\nOooOpppss This Block is already filled....!!!\n\n\n\n\n");          //this line is printed if the box is already filled
      system("pause");                                                                    // system pasuse is the system function which is used for a pause and to continue it requires pressing of any key
      system("cls");                                                                      //this is also a system function which  is used for clearing screen
}
int condition1()                                                                          //a funtion which return integer value if any of the given condition is true...THIS CONDITION IS FOR PLAYER 1
{
   
      if ( a[0][0]=='X' && a[0][1]=='X' && a[0][2]=='X'  ||   a[1][0]=='X' && a[1][1]=='X' && a[1][2]=='X'   ||   a[2][0]=='X' && a[2][1]=='X' && a[2][2]=='X' )           //this condition checks all the horizontal rows values one by one and returns 1 if condition is true for any horizontal row
           return 1;
      else if ( a[0][0]=='X' && a[1][0]=='X' && a[2][0]=='X' ||   a[0][1]=='X' && a[1][1]=='X' && a[2][1]=='X'   ||   a[0][2]=='X' && a[1][2]=='X' && a[2][2]=='X' )       //this condition checks all the vertical column values one by one and returns 1 if condition is true for any column row
           return 1;
      else if ( a[0][0]=='X' && a[1][1]=='X' && a[2][2]=='X')                //this condition checks the principle diagonal values and returns 1 if condition is true. AND operator is used because all conditions in that statement should be true in order to return 1
           return 1;
      else if ( a[0][2]=='X' && a[1][1]=='X' && a[2][0]=='X')                //this condition checks the values in diagonal boxes
           return 1;                                                         //it the above statement is true it returns value 1

}
int condition2()            //a funtion which return integer value if any of the given condition is true...THIS CONDITION IS FOR PLAYER 2
{
   
      if ( a[0][0]=='O' && a[0][1]=='O' && a[0][2]=='O'   ||   a[1][0]=='O' && a[1][1]=='O' && a[1][2]=='O'   ||   a[2][0]=='O' && a[2][1]=='O' && a[2][2]=='O' )         //this condition checks all the horizontal rows values one by one and returns 2 if condition is true for any horizontal row
           return 2;
      else if ( a[0][0]=='O' && a[1][0]=='O' && a[2][0]=='O'   ||   a[0][1]=='O' && a[1][1]=='O' && a[2][1]=='O'   ||   a[0][2]=='O' && a[1][2]=='O' && a[2][2]=='O' )     //this condition checks all the vertical column values one by one and returns 2 if condition is true for any column row
           return 2;
      else if ( a[0][0]=='O' && a[1][1]=='O' && a[2][2]=='O')          //this condition checks the principle diagonal values and returns 2 if condition is true. AND operator is used because all conditions in that statement should be true in order to return 2
           return 2;
      else if ( a[0][2]=='O' && a[1][1]=='O' && a[2][0]=='O')          //this condition checks the values in diagonal boxes
           return 2;                                                   //it the above statement is true it returns value 2

}
int win1()                 //a funtion which declares the winning of player 1 and returns 0 if any condition in  condition1() is true.
{
      if(condition1()==1) //selection statement used to tets the conidition1() function

      printf("\n\n\nCongratulations...!!! Player 1 is the WINNER...!!!\n\n"); //winning declaration printing
 
      return 0;
}
int win2()                //a funtion which declares the winning of player 2 and returns 0 if any condition in  condition2() is true.
{
     if(condition2()==2) //selection statement used to tets the conidition2() function

     printf("\n\n\nCongratulations...!!! Player 2 is the WINNER...!!!\n\n\n"); //winning declaration printing

     return 0;
}
void toe()      //void function used which returns nothing. It is just printed to tell the user about the box number for selection
{
     printf("\n\t\t\t 1 | 2 | 3 \n\t\t\t___|___|___\n\t\t\t 4 | 5 | 6 \n\t\t\t___|___|___\n\t\t\t 7 | 8 | 9 \n\t\t\t   |   |   \n\n\n");
}
void print1()   //a funtion which  when user enter the box number print the value in selected box according to the user selection
{
     printf("\a\a\n\t\t\t %c | %c | %c \n\t\t\t___|___|___\n\t\t\t %c | %c | %c \n\t\t\t___|___|___\n\t\t\t %c | %c | %c \n\t\t\t   |   |   \n\n\n\a\a",a[0][0],a[0][1],a[0][2],a[1][0],a[1][1],a[1][2],a[2][0],a[2][1],a[2][2]);
}
void design()
{
 //    char *pt1,*pt2; //pointers which gets the address of character and pass it to the s1 and s2
   //  pt1=st.s1;      //assigning the pointer 1 to an array object of data structure
    // pt2=st.s2;      //assigning the pointer 2 to an array object of data structure

     name(st.s1,st.s2);        //name function declared above is called here
   
system("cls");            // screen clearing

     for ( i=1 ; i<10 ; i++ )  //simple for loop from 1 to 9
      {
         phir:               //reference name for goto statement
            toe();           //toe funtion made above is called here
              if(i%2==1)     //selection statement which select the player's turn. if remainder of any value of i and 2 is 1 then it's player one's turn otherwise it's player 2's turn
                  {
                      printf(" %s's Turn : ",st.s1);              //if i%2 gives remainder 1 then name of player 1 is used
                  }
              else
                  {
                      printf(" %s's Turn : ",st.s2);              //if i%2==1 is false then player 2's turn is announced
                  }
      st.ch = ( getche()-48 );                                    //this gets an integer input from user in box and print it as character
      if ( st.ch<0 || st.ch>9 )                                   //check condition which checks if value enetered by user is greater than 9 or lesser than zero then next block is printed otherwise next block is skipped
      {
         printf("\n\n\nYou have chosen wrong block...!!!\n\n\n"); //if selected box by user is less than 0 and greater than 9 then it prints that the user has choosen wrong box.
         system("pause");                                         //to pause the program
         system("cls");                                           //to clear the screen
         goto phir;                                               //goto statement which goes to phir declared above and check all the condition above again
      }
      switch(st.ch)                                               //switch selection statement
      {
         case 1 :                                                 // in switch selection statement we use cases for checking conditions
     
               if(a[0][0]=='X' || a[0][0]=='O')                  //checks value enetered in 1x1 by user
     
           {
                    filled();                                     // checks weather the box is filled or not
                    break;                                        //break statement used to terminate filled funtion
                }
     
           if(i%2==1)                                        // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
     
          {
                    a[0][0]='X';                                  //enter X character in place of integer
                    print1();                                     // print the game box which helps the user for selecting box number
                    win1();                                       //checks the condition that player 1 wins or not
                    system("pause");                              //system funtion used to pause
                    system("cls");                                //for clearing screen
                    break;                                        //break statement for player 1
               }
       
          else                                                    //if above if condition is false this else condition is used
       
          {
                    a[0][0]='O';                                 //enter O character in place of integer
                    print1();                     //print the game box which helps the user for selecting box number
                    win2();       //checks the condition that player 2 wins or not
                    system("pause");  //system funtion used to pause
                    system("cls");   //for clearing screen
                    break; //break statement for player 2
               }
            break; //break statement for case 1
   
         case 2 : //2nd possibility of value enetered by user
             
         if(a[0][1]=='X' || a[0][1]=='O') //checks value enetered in 1x2 by user
                {
                    filled(); // checks weather the box is filled or not
                    break; //break statement used to terminate filled funtion
                }
                if(i%2==1)  // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[0][1]='X'; //enter X character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win1();   //checks the condition that player 1 wins or not
                    system("pause");   //system funtion used to pause
                    system("cls");     //for clearing screen
                    break;   //break statement for player 1
                }
          else   //if above if condition is false this else condition is used
                {
                    a[0][1]='O'; //enter O character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win2();     //checks the condition that player 2 wins or not
                    system("pause");   //system funtion used to pause
                    system("cls");    //for clearing screen
                    break;   //break statement for player 2
}
            break; //break statement for case 2
       
case 3 : //3rd possibility of value enetered by user
             
         if(a[0][2]=='X' || a[0][2]=='O') //checks value enetered in 1x3 by user
                {
                    filled(); // checks weather the box is filled or not
                    break; //break statement used to terminate filled funtion
                }

                if(i%2==1) // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[0][2]='X'; //enter X character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win1(); //checks the condition that player 1 wins or not
                    system("pause");  //system funtion used to pause
                    system("cls");    //for clearing screen
                    break; //break statement for player 1
}
          else     //if above if condition is false this else condition is used
                {
                    a[0][2]='O';  //enter O character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win2();   //checks the condition that player 2 wins or not
                    system("pause");   //system funtion used to pause
                    system("cls");     //for clearing screen
                    break; //break statement for player 2
                }
            break; //break statement for case 3
       
case 4 : //fourth possibility of value enetered by user
             
         if( a[1][0]=='X' || a[1][0]=='O' ) //checks value enetered in 2x1 by user
                {
                    filled();   // checks weather the box is filled or not
                    break; //break statement used to terminate filled funtion
                }

                if (i%2==1)   // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[1][0]='X'; //enter X character in place of integer
                    print1();                                   // print the game box which helps the user for selecting box number
                    win1();                                    //checks the condition that player 1 wins or not
                    system("pause");                            //system funtion used to pause
                    system("cls");                               //for clearing screen    
                    break;                                   //break statement for player 1
}
          else                                                //if above if condition is false this else condition is used
                {
                    a[1][0]='O';                                 //enter O character in place of integer
                    print1();                                    // print the game box which helps the user for selecting box number
                    win2();                                      //checks the condition that player 2 wins or not
                    system("pause");                           //system funtion used to pause
                    system("cls");                              //for clearing screen
                    break;                                    //break statement for player 2
                }
            break;                                            //break statement for case 4
       
case 5 :                                            //fifth possibility of value enetered by user
             
         if( a[1][1]=='X'  ||  a[1][1]=='O' )        //checks value enetered in 2x2 by user
                {
                    filled();                                 // checks weather the box is filled or not
                    break;                                   //break statement used to terminate filled funtion
                }

                if (i%2==1)                                   // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[1][1]='X';                                   //enter X character in place of integer
                    print1();                                    // print the game box which helps the user for selecting box number
                    win1();                                    //checks the condition that player 1 wins or not
                    system("pause");                             //system funtion used to pause
                    system("cls");                              //for clearing screen
                    break;                                   //break statement for player 1
                }
           else                                              //if above if condition is false this else condition is used
                {
                    a[1][1]='O';                            //enter O character in place of integer
                    print1();  // print the game box which helps the user for selecting box number
                    win2();     //checks the condition that player 2 wins or not
                    system("pause");   //system funtion used to pause
                    system("cls");
                    break; //break statement for player 2
                }
            break; //break statement for case 5
     
    case 6 : //sixth possibility of value enetered by user
               
         if ( a[1][2]=='X'  ||  a[1][2]=='O' ) //checks value enetered in 2x3 by user
                {
                    filled();   // checks weather the box is filled or not
                    break; //break statement used to terminate filled funtion
                }

                if (i%2==1)   // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[1][2]='X';   //enter X character in place of integer
                    print1();   // print the game box which helps the user for selecting box number
                    win1();  //checks the condition that player 1 wins or not
                    system("pause");   //system funtion used to pause
                    system("cls");     //for clearing screen
                    break;   //break statement for player 1
                }
          else     //if above if condition is false this else condition is used
                {
                    a[1][2]='O'; //enter O character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win2();   //checks the condition that player 2 wins or not
                    system("pause");  //system funtion used to pause
                    system("cls");     //for clearing screen
                    break; //break statement for player 2
                }
            break; //break statement for case 6
       
case 7 : //7th possibility of value enetered by user
               
               if ( a[2][0]=='X'  ||  a[2][0]=='O' ) //checks value enetered in 3x1 by user
                {
                    filled();  // checks weather the box is filled or not
                    break;  //break statement used to terminate filled funtion
                }

                if (i%2==1) // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[2][0]='X'; //enter X character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win1();  //checks the condition that player 1 wins or not
                    system("pause");   //system funtion used to pause
                    system("cls");    //for clearing screen
                    break;   //break statement for player 1
                }
          else   //if above if condition is false this else condition is used
                {
                    a[2][0]='O'; //enter O character in place of integer
                    print1();  // print the game box which helps the user for selecting box number
                    win2();   //checks the condition that player 2 wins or not
                    system("pause");  //system funtion used to pause
                    system("cls");    //for clearing screen
                    break;   //break statement for player 2
                }
            break;   //break statement for case 7
       
case 8 : //8th possibility of value enetered by user
               
         if ( a[2][1]=='X'  ||  a[2][1]=='O' ) //checks value enetered in 3x2 by user
                {
                    filled();   // checks weather the box is filled or not
                    break;   //break statement used to terminate filled funtion
                }

                if (i%2==1) // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                    a[2][1]='X';   //enter X character in place of integer
                    print1();  // print the game box which helps the user for selecting box number
                    win1();  //checks the condition that player 1 wins or not
                    system("pause");  //system funtion used to pause
                    system("cls");    //for clearing screen
                    break; //break statement for player 1
                }
          else     //if above if condition is false this else condition is used
                {
                    a[2][1]='O'; //enter O character in place of integer
                    print1(); // print the game box which helps the user for selecting box number
                    win2();     //checks the condition that player 2 wins or not
                    system("pause");  //system funtion used to pause
                    system("cls");    //for clearing screen
                    break;   //break statement for player 2
                }
            break; //break statement for case 8
       
case 9 : //9th possibility of value enetered by user
               
         if ( a[2][2]=='X'  ||  a[2][2]=='O' ) //checks value enetered in 3x3 by user
                {
                    filled();  // checks weather the box is filled or not
                    break;  //break statement used to terminate filled funtion
                }

                if (i%2==1) // player 1 selection...if i%2 gives remainder 1 then it is player 1's turn otherwise player 2's turn
                {
                     a[2][2]='X';  //enter X character in place of integer
                     print1(); // print the game box which helps the user for selecting box number
                     win1(); //checks the condition that player 1 wins or not
                     system("pause");   //system funtion used to pause
                     system("cls");     //for clearing screen
                     break; //break statement for player 1
                }
          else   //if above if condition is false this else condition is used
                {
                     a[2][2]='O'; //enter O character in place of integer
                     print1(); // print the game box which helps the user for selecting box number
                     win2();     //checks the condition that player 2 wins or not
                     system("pause");   //system funtion used to pause
                     system("cls");     //for clearing screen
                     break; //break statement for player 2
                }
            break;  //break statement for case 9
    }
  }
}
void gameloading()
{
      system("cls");      //for clearing screen
      int length_of_loading_bar=0,timer=0;    //initializing the length of bar for delay and timer for the speed of delaying
      printf("\n\n\n\n\n\n\n\n\n\n\t\t\t   GaMe iS LoAdInG...");  //Loading indication
      printf("\n\t\t\t  ");
      for(length_of_loading_bar=0;length_of_loading_bar<20;length_of_loading_bar++) //loop for the horizontal length of bar
             {
                   for(timer=0;timer<10000000;timer++); //semi colon is used bcoz we don't want to print anything vertically instead we want to count time...here we are using loop as counter
                    printf("%c",182); //special symbol askey value 182 is used for 19 times printing of special symbol
             }
      printf("\n"); //to print on new line
      system("cls");       //for clearing screen
}