cal

/*
    Visual C++ - Travaux Pratique

    Exercice: 5
    Etudiant: BOUELKHEIR Yassine
*/


#include <iostream>
#include <stdlib.h>

using namespace std;

class Calculatrice
{
    public:
        int Value = 0;
        int showMenu()
        {
            system("cls");

            int selection;
            cout << "On a Value = " << Value <<", Choisissez une operation:\n\n\n1. Ajouter 1\n\n2. Multiplier par 2\n\n3. Soustraire 4\n\n4. Quitter\n\nOperation: ";
            cin >> selection;
            return this->setSelection(selection);
        }
        int setSelection(int selection)
        {
            switch(selection)
            {
                case 1: {
                    Value++;
                    break;
                }
                case 2: {
                    Value *= 2;
                    break;
                }
                case 3:{
                    Value -= 4;
                    break;
                }
                case 4: {
                    return -1;
                    break;
                }
                default: {
                    this->showMenu();
                    break;
                }
            }
        }
};

int main()
{
    Calculatrice Exemple;
    while(1)
    {
        if(Exemple.showMenu() == -1) break;
    }
    return 0;
}