gcb_lcm.cpp

#include <iostream>
#include <iomanip>

using namespace std;

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

int main()
{
    int a = 0;
    int b = 0;
    cout << "Enter (a) and (b) respectively: " <<endl;
    cin >> a;
    cin.ignore(1, ' ');
    cin >> b;
    cout << "GCD: " << gcd(a, b) << endl;
    cout << "LCM: " << fixed << setprecision(0)<< lcm(a, b) << endl;
    return 0;
}

int gcd(int a, int b){
    int a_rem = 0;

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

long double lcm(long a, long b){
     long double mult =(long double) a * b;

    return mult / gcd(a, b);
}