最大公约数

#include <stdio.h>

int gcd(int a, int b) {
    if (a % b == 0) {
        return b;
    } else {
        return gcd(b, a % b);
    }
}

int main() {
    int num1, num2;
    
    printf("Enter first number: ");
    scanf("%d", &num1);
    printf("Enter second number: ");
    scanf("%d", &num2);
    
    int result = gcd(num1, num2);
    
    printf("The greatest common divisor of %d and %d is: %d\n", num1, num2, result);
    
    return 0;
}