//this is a class to store pairs of integers
#include <string>
#include <iostream>
using namespace std;

class intPair
{
private:
    int a;
    int b;
public:
    intPair()
    {
        a =0;
        b=0;
    }

    intPair(int i1, int i2)
    {
        a=i1;
        b=i2;
    }

    int getFirst(){return a;}
    int getSecond(){return b;}

    void setFirst(int i){a = i;}
    void setSecond(int i){b = i;}

    //displays pair in form (a, b)
    void displayPair()
    {
        cout<< "("<<a<<", "<<b<<")";
    }

    intPair operator+(intPair right)
    {
        int first;
        int second;

        first = this->a + right.a;
        second = this->b+right.b;
        intPair sum(first, second);
        return sum;

    }

    void swap();


};

    void intPair::swap()
    {
        int temp = a;
        a = b;
        b = temp;
    }

int mainI()
{
    intPair p1(1, 2);
    intPair p2(3, 4);
    p2.swap();
    intPair p3 = p1+p2;
    cout<< "The sum of ";
    p1.displayPair();
    cout<<" and ";
    p2.displayPair();
    cout<<" is ";
    p3.displayPair();


}