Demonstrating operator overloading by using friend function

#include<iostream>
using namespace std;

class Complex
{
        int num1, num2;
    public:
        void accept()
        {
                cout<<"\n Enter Two Complex Numbers : ";
                cin>>num1>>num2;
        }

        //Overloading '+' operator using Friend function
        friend Complex operator+(Complex c1, Complex c2);   
                           
        void display()
        {
                cout<<num1<<"+"<<num2<<"i"<<"\n";
        }
};
Complex operator+(Complex c1, Complex c2)
{
        Complex c;
        c.num1=c1.num1+c2.num1;
        c.num2=c1.num2+c2.num2;
        return(c);
}
int main()
{
        Complex c1,c2, sum;      //Created Object of Class Complex i.e c1 and c2

        c1.accept();  //Accepting the values
        c2.accept();

        sum = c1+c2;   //Addition of object
    
        cout<<"\n Entered Values : \n";
        cout<<"\t";
        c1.display();    //Displaying user input values
        cout<<"\t";
        c2.display();
  
        cout<<"\n Addition of Real and Imaginary Numbers : \n";
        cout<<"\t";
        sum.display();  //Displaying the addition of real and imaginary numbers
     
        return 0;
}