lcm cpp

/*program to find gcd of 2 numbers using functions*/

#include <iostream>

using namespace std;

int gcd (int ,int );        //function declaration
int lcm (int ,int );

int main()
{
    int num1=0,num2=0,result=0,cont=0;
    do
    {
        cout<<"\nENTER 2 POSITIVE NUMBERS ";
        cout << "\nENTER NUMBER 1:";
        cin>>num1;
        cout << "ENTER NUMBER 2:";
        cin>>num2;
        result = lcm(num1,num2);
        cout<<"\nTHE LCM OF THE ENTERED NUMBERS IS : "<<result;
        cout<<"\n\nDO YOU WANT TO CALCULATE AGAIN (1/0) :";
        cin>>cont;
    }while(cont==1);
    return 0;
}


int gcd (int m1 , int m2)
{
    if(m1==0 || m2==0)
    {
        return 0;
    }
        do
        {
            if(m1 > m2)
            {
                m1 = m1 - m2;
            }
            else
            {
                m2 = m2 - m1;
            }

        }while(m1!=m2);

        return(m1);
}


// method that finds lcm of numbers
int lcm(int num1, int num2){

    int res = gcd(num1, num2);
    int lcm_num = (num1 * num2) / res;
    return lcm_num;
}

/******************************OUTPUT**********************************

ENTER 2 POSITIVE NUMBERS
ENTER NUMBER 1:12
ENTER NUMBER 2:14

THE LCM OF THE ENTERED NUMBERS IS : 84

DO YOU WANT TO CALCULATE AGAIN (1/0) :1

ENTER 2 POSITIVE NUMBERS
ENTER NUMBER 1:15
ENTER NUMBER 2:25

THE LCM OF THE ENTERED NUMBERS IS : 75

DO YOU WANT TO CALCULATE AGAIN (1/0) :0
*/