编辑代码

#include <stdio.h>

int gcd(int m, int n) {
    int gcd = 1;
    for (int i = 2; i <= m && i <= n; i++) {
        if (m % i == 0 && n % i == 0) {
            gcd = i;
        }
    }
    return gcd;
}

int main() {
    int m = 12, n = 18;
    printf("%d 和 %d 的最大公约数是：%d\n", m, n, gcd(m, n));
    return 0;
}