Factorial Calculator which gives output for every value of variable in loop

SAMPLE OUTPUT

1!=1

2!=2

3!=6

4!=24

INPUT CODE

#include<stdio.h>

#include<math.h>

void line()

{

int i;

    printf("\n");

for(i=1;i<=35;i++)

    printf("=");

}

void header()

{

printf("\n");

printf("Built and Designed by Arslan-ud-Din-Shafiq\n\nReg. No .DDP-SP14-BSE-005");

printf("\n");

}

int main()

{

line();

header();

line();

int a, b, r = 1;

printf("\nEnter Factorial Number: ");

scanf("%d", &b);

{

for(a=1; a<=b; a++)

   {

r=r*a;

printf("%d! = %d \n",a,r);

   }

}

return 0;

}