The Calculator

The task

English

Write a Calculator class, which will simulate the behaviour of a electronic calculator. Each of the Push0...Push9, and PushPlus...PushDiv member functions should act like pushing a button on the calculator. Then the Result is the only member function which returns a value - the result of the calculation.

Important: the calculator should only use integers (int)

Polski

Napisz klasę Calculator która będzie symulować kalkulator. Funkcje klasy Push0...Push9, and PushPlus...PushDiv powinny działać jak naciśnięcie odpowiednich klawiszy. Zaś funkcja Result powinna zwrócić wynik.

Ważne: kalkulator ma liczyć tylko liczby całkowite (int).

Example:

  Calculator calc;
  calc.Push1();
  calc.Push2();
  calc.PushPlus();
  calc.Push1();   
  calc.Push2();
  calc.PushMult();
  calc.Push1();
  calc.Push2();
  int value = calc.Result();

This should end with value=288. It's a old calculator: 12+12=24 ... 24*12=288.

Requirements

Only the changes to Calculator.cpp and Calculator.h will be considered as solution.