[OOP] ISPIT - 27.08.2019.

#include <iostream>

using namespace std;

// 3. zadatak
class Garage {
private:
    friend int IzracunSati(Garage, double, int);
protected:
    int mTotalPlaces; // > 0
    int mOccupiedPlaces; // >= 0
    double mHourlyRate; // > 0
public:
    Garage(int, double);
    bool isFull() const;
    void parkCar();
    double Izracun() const;
};

Garage::Garage(int totalplaces, double hourlyrate) {
    if (totalplaces > 0 && hourlyrate > 0) {
        mTotalPlaces = totalplaces;
        mHourlyRate = hourlyrate;
    }
}

bool Garage::isFull() const {
    if (mOccupiedPlaces == mTotalPlaces) {
        return true;
    }
    return false;
}

void Garage::parkCar() {
    if (isFull()) {
        return;
    }
    else {
        mOccupiedPlaces++;
    }
}

void runExample() {
    Garage garage(100, 2.50);
    if (garage.isFull()) {
        cout << "No space left." << endl;
    }
    else {
        garage.parkCar();
    }
}

// 4. zadatak
double Garage::Izracun() const {
    return (mOccupiedPlaces * mHourlyRate * 24) / mTotalPlaces;
}

// 5. zadatak
int IzracunSati(Garage garage, double percent, int cars) {
    int time = 0;
    while ((garage.mOccupiedPlaces / garage.mTotalPlaces) < percent) {
        garage.mOccupiedPlaces += cars;
        time++;
    }

    return time;
}

// 6. zadatak
class DvotarifnaGarage : Garage {
private:
    bool mTarifa; // true = noc, false = dan
    double mHourlyRate;
public:
    DvotarifnaGarage(bool, double, int, double);
    void PromjeniTarifu();
    double Izracun() const;
};

DvotarifnaGarage::DvotarifnaGarage(bool tarifa, double hourlyratenight, int totalplaces, double hourlyrateday) : mTarifa(tarifa), Garage(totalplaces, hourlyrateday) {
    if (hourlyratenight > 0) {
        this->mHourlyRate = hourlyratenight;
    }
}

void DvotarifnaGarage::PromjeniTarifu() {
    if (mTarifa == true) {
        mTarifa = false;
    }
    else {
        mTarifa = true;
    }

}

// 7. zadatak
double DvotarifnaGarage::Izracun() const {
    return (((mOccupiedPlaces / 2) * Garage::mHourlyRate * 24) + ((mOccupiedPlaces / 2) * DvotarifnaGarage::mHourlyRate * 24)) / mTotalPlaces;
}