Adding two objects using binary plus (+) operator overloading program in c++

/*C++ program to add two objects using binary plus (+) operator overloading.*/
 
#include<iostream>
using namespace std;
 
class NUM
{
    private:
        int n;
         
    public:
        //function to get number
        void getNum(int x)
        {
            n=x;
        }
        //function to display number
        void dispNum(void)
        {
            cout << "Number is: " << n;
        }
        //add two objects - Binary Plus(+) Operator Overloading
        NUM operator +(NUM &obj)
        {
            NUM x;  //create another object
            x.n=this->n + obj.n;
            return (x); //return object
        }
};
int main()
{
    NUM num1,num2,sum;
    num1.getNum(10);
    num2.getNum(20);
     
    //add two objects
    sum=num1+num2;
     
    sum.dispNum();
    cout << endl;
    return 0;
}

Output

    Number is: 30