opr_ovr_polymorphism.cpp

#include <iostream>

using namespace std;

class Complex{
    private:
        int real, imag;                 // imag for imagination
        
    public:
        Complex(int r = 0, int i = 0) {real = r; imag = i;}
        
        // This is automatically called when '+' is used between two Complex Objects
        Complex operator + (Complex const & obj) {
            Complex res;
            
            res.real = real + obj.real;
            res.imag = imag + obj.imag;
            
            return res;
        }
        
        void print() {
            cout << real << " + i " << imag << endl;
        }
};

int main() {
    Complex n1(1, 2), n2(4, 5);
    Complex n3 = n1 + n2;
    
    n3.print();
}