Code and Debug 2.0

#include <iostream>
using namespace std;

void hcf(int a , int b){
    ans = a;
    while (ans > 0) {
        if (a % ans == 0 && b % ans == 0) {
            break;
        }
        ans++;
    }
    return ans;
}

void lcm(int a , int b){
    System.out.println(a * b / hcf(a , b));
}

int main(){
    int t;
    cin >> t;
    while(t--){
        int a , b;
        cin >> a >> b;
        cout < hcf(a , b) < " ";
        lcm(b , a);
    }
    return 0;
}