#include "stdafx.h"
#include "math.h"
#include <iostream>
#include <stdio.h>


using namespace std;

class koord
{
protected:
    double a, b;
public:
    float vvod()
    {
        cout << "Koord X: " << endl;
        cin >> a;
        cout << "Koord Y:  " << endl;
        cin >> b;
        return 0;
    }
};

class chislo : public koord
{
protected :
    double c;
    double S;
public :
    double summa()
    {
        return S = (a + c)*(b + c);
    }

};

int main()
{
    setlocale(0, "");
    koord* ko;
    chislo* ch = new chislo;
    ko->vvod();
    cout << " Summa = " << endl;
    ch->summa();
    system("pause");
    return 0;
}