#include <cstdlib>
#include <iostream>
 
using namespace std;
 
int main(int argc, char *argv[])
{
    //valtozok
    int valasztas;
    double a,b,c,d;
    char muvelet;
    cout << "Valassz:" << endl << endl << "[1.] Szelekcio\n[2.] IDK\n[3.] IDK\n\n";
        cin >> valasztas;
        if ( valasztas == 1 ) {
                system("CLS");
                cout << "\t\tSzelekcio" << endl;
                cout << endl << endl;
//If/Else
                cout << "Szamologep(if/else): " << endl;
                        cout << "a = ";
                        cin >> a;
                        cout << "b = ";
                        cin >> b;
                        cout << "muvelet: ";
                        cin >> muvelet;
                //Ha '+'
                if ( muvelet == '+' ) {
                        c = a + b;
                        cout << "Az eredmeny: " << c << endl;
                }
                //Ha '-'
                if ( muvelet == '-' ) {
                        c = a - b;
                        cout << "Az eredmeny: " << c << endl;
                }
                //Ha '*'
                if ( muvelet == '*' ) {
                        c = a * b;
                        cout << "Az eredmeny: " << c << endl;
                }
                // Ha '/' && b == 0 akkor nem vegezheto el az osztas..
                /*if ( muvelet == '/' ) {
                                if ( b == 0 ) cout << "0.." << endl;
                                else c = a / b;
                }*/
                if ( muvelet == '/'  && b != 0 ) {
                        c = a / b;
                        cout << "Az eredmeny: " << c << endl;
                }
                else {
            cout << "nem muvelet!" << endl;    
        }
//Switch/Case
        cout << endl << endl;
                cout << "Szamologep(switch/case): " << endl;
                        cout << "a = ";
                        cin >> a;
                        cout << "b = ";
                        cin >> b;
                        cout << "muvelet: ";
                        cin >> muvelet;
                        switch(muvelet) { // ide azt a valtozot irjuk amit vizsgalni szeretnenk
                case '+': //Ha + 'ilyenek koze kell rakni' most nem indoklom
                                        c = a + b;
                                        cout << "Az eredmeny: " << c << endl;
                                break; // Ez a legfontosabb ha ezt elhagyod akkor tovabbugrik a kivonasra es elvan baszva minden
                                case '-':
                                        c = a - b;
                                        cout << "Az eredmeny: " << c << endl;
                                break;
                                case '*':
                                        c = a * b;
                                        cout << "Az eredmeny: " << c << endl;
                                break;
                                case '/':
                                        if ( b != 0 ) {
                                                c = a + b;
                                                cout << "Az eredmeny: " << c << endl;
                                        }
                                        else cout << "0..." << endl;
                                break;
                                default: cout << "nem muvelet.." << endl; // Ez a default ide akkor jon a prog ha az elozo cuccok nem teljesulnek
                                break; // itt mar felesleges a break; de sose art 6char :D
            }
       
        }
    cout << endl;
    system("PAUSE");
    return EXIT_SUCCESS;
}