Program to find the LCM of a number

#include<iostream>
 
void main()
{
 using namespace std;
 
 int num1,num2,a,b;
 cout<<"Enter 1st no. ";
 cin>>num1;
 cout<<"Enter 2nd no. ";
 cin>>num2;
 a=num1;
 b=num2;
 while(a!=b)
 {
  if(a<b)
  {
   a+=num1;
  }
  else
  {
   b+=num2;
  }
 }
 
 cout<<"LCM is = "<<a;
 cin.get();
}