#include<iostream>
using namespace std;
class A
{
    int a,b;
    public:
    A(int x,int y)
    {
        a=x;
        b=y;
    }
    A()
    {

    }
    A operator -(A o4)
    {
        A o5;
        o5.a = a-o4.a;
        o5.b = b-o4.b;
        return o5;
    }

    A operator +(A o4)
    {
        A o5;
        o5.a = a+o4.a;
        o5.b = b+o4.b;
        return o5;
    }

    A operator *(A o4)
    {
        A o5;
        o5.a = a*o4.a;
        o5.b = b*o4.b;
        return o5;
    }

    A operator /(A o4)
    {
        A o5;
        o5.a = a/o4.a;
        o5.b = b/o4.b;
        return o5;
    }
    void display()
    {
        cout<< "a = "<<a<<" b = "<<b;
    }

};
int main()
{
    A o1(10,30),o2(5,3),o3;

    int ch;
    while(1)
    {
        cout<< "\n1. Add\n2. Substraction\n3. Multiplication\n4. Division\n5. Exit\n";
        cin>>ch;
        switch(ch)
        {
        case 1:
                o3=o1+o2;
                o3.display();
                break;
        case 2:
                o3=o1-o2;
                o3.display();
                break;
        case 3:
                o3=o1*o2;
                o3.display();
                break;
        case 4:
                o3=o1/o2;
                o3.display();
                break;
        case 5:
        		exit(0);
        default:
            break;

        }
    }
}