//C Program to find
//GCd of two numbers
#include <stdio.h>

//Recursion function to
//Calculate and return gcd of a and b
int gcd(int a,int b)
{
    //Everything divides 0
    if(a==0)
        return b;
    if(b==0)
        return a;

// base case
    if(a==b)
        return a;

//a is greater
    if(a>b)
        return gcd(a-b,b);
    return gcd(a,b-a);
}

int main() 
{
    int a=192,b=36;
    printf("GCD of %d and %d is %d",a,b,gcd(a,b)); 
    return 0;
}