First Object Oriented CPP Program

 //my first object oriented cpp program

#include<iostream>

using namespace std;

int x;//variable

class Maths

{

    int num1;//Data member

    int num2;

    int res;

    public:

   void getData()//member function

    {

    cout<<"Enter first number";

    cin>>num1;

    cout<<"\n Enter second number";

    cin>>num2;

    }//end of function getData

    //num1=10;

    //num2=20;

    void sum()

    {

    res=num1+num2;

    cout<<"\n The sum of "<<num1<<" and "<<num2<<" is: "<<res;

    }//end of function sum

};

int main()//non member funtion

{

    Maths mt;

    mt.getData();

    mt.sum();

}//end of main