/*
 * C Program to find HCF of a given Number using Recursion
 */
#include <stdio.h>

int hcf(int, int);

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

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