/*
 * C Program to find GCD of given Numbers using Recursion
 */
#include <stdio.h>

int gcd(int, int);

int main()
{
    int a, b, result;
    printf("Enter the two numbers to find their GCD: ");
    scanf("%d%d", &a, &b);
    result = gcd(a, b);
    printf("The GCD of %d and %d is %d.\n", a, b, result);
}

int gcd(int a, int b)
{
    while (a != b)
        {
            if (a > b)
                {
                    return gcd(a - b, b);
                }
            else
                {
                    return gcd(a, b - a);
                }
        }
    return a;
}
}