Stacked in a while loop

Question

I have this simple problem:

# include <stdio.h>
int main(){
    unsigned a, b, x, y, temp;  
    a=100;
    b=30;
    
    x=a*b;
    printf("%u", x);
    while(b) temp=a%b, a=b, b=temp; // try to comment this line
    y=b;
    x/=y;
    printf("%u", x);
    return 0;
}

If I put this code into main.c it returns "Program finished with exit code 0", and there will be no printf, else if I comment the while loop I will get the printfs.

Can you explain why the while loop influences the program this way? What actually I should achieve with this problem is the division by 0 at the final line x/=y;.

Answer 1

Put fflush(stdout); after each printf() call.

When the division by 0 is occured, the program will abort without flushing contents in output buffer.