to find GCD of two numbers

GCD.c

#include <stdio.h>

int gcd(int a, int b){
    int ans = -1;
    while(ans != 0){
        ans = a%b;
        a = b;
        b = ans;
    }
    return(a);
}

void main() {
    int a;
    a = gcd(96,28);
    
    printf("%d",a); 
}