C中的编译时LCM/GCD

#include <stdio.h>

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

int main() {
    int num1 = 56;
    int num2 = 98;
    printf("GCD of %d and %d is: %d\n", num1, num2, gcd(num1, num2));
    return 0;
}

#include <stdio.h>

int gcd(int a, int b);
int lcm(int a, int b);

int main() {
    int num1 = 56;
    int num2 = 98;
    printf("LCM of %d and %d is: %d\n", num1, num2, lcm(num1, num2));
    return 0;
}

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

int lcm(int a, int b) {
    return (a * b) / gcd(a, b);
}