[M. Bison]

Here's what is happening: After inputting the number, you're pressing enter. Enter is a newline character and doesn't actually disappear. The subsequent scanf is using the character to terminate the loop.

The easiest solution is to add a space before %c. I've also added some newlines to cleanup your output.

Try this:

Code:

#include <stdio.h>
int main()
{
char another;
int num;
do
{
printf("Enter a number\n");
scanf("%d",&num);
printf("Square of %d is %d\n",num,num*num);
printf("Want to enter another number? y/n\n");
scanf(" %c",&another);
} while(another=='y');
return 0;
}

Why isn't anyone else replying anymore?