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;
}