Наследование - C++ - Ответ 4425214

#include <iostream>
#include <assert.h>
using namespace std;
 
int people_on_base=100;
int vehicles_on_base=30;
double petrol_on_base=700;
double goods_on_base=45;
 
 
 
class Vehicle
{
protected:
    int people;
    double Petrol_Amount;
    double Tank_Volume;
public:
    Vehicle(double petrol_amount, double tank_volume):Petrol_Amount(petrol_amount),Tank_Volume(tank_volume),people(1){}
    double getTankVolume() const
    {
        return Tank_Volume;
    }
    double getPetrolAmount() const
    {
        return Petrol_Amount;
    }
    void arrive()
    {
        people_on_base++;
        vehicles_on_base++;
    }
    int leave()
    {
        people_on_base--;
        vehicles_on_base--;
        petrol_on_base=petrol_on_base-Tank_Volume+Petrol_Amount;
        return 0;
    }
};
 
class Bus : public Vehicle
{
protected:
    int PeopleCount;
    int MaxPeople;
public:
    Bus(int people, int max_people, double petrol, double max_petrol):PeopleCount(people),MaxPeople(max_people),Vehicle(petrol,max_petrol){}
    int getPeopleCount() const
    {
        return PeopleCount;
    }
    int getMaxPeople() const
    {
        return MaxPeople;
    }
    void arrive()
    {
        people_on_base=people_on_base+getPeopleCount()+1;
        vehicles_on_base++;
        PeopleCount=0;
    }
    int leave()
    {
        people_on_base=people_on_base-getMaxPeople()-1;
        vehicles_on_base--;
        petrol_on_base=petrol_on_base+(-Tank_Volume+Petrol_Amount);
        Petrol_Amount=Tank_Volume;
        PeopleCount=MaxPeople;
        return 0;
    }
};
 
class Truck : public Vehicle
{
protected:
    double goods;
public:
    Truck(double load, double max_load, double petrol, double max_petrol);
    double getCurrentLoad() const;
    double getMaxLoad() const;
};
 
int main()
{
 
    Bus v(32.5, 40, 19.5, 60);
 
cout << "Bus:\n";
cout << "People = " << v.getPeopleCount() << "\n";
cout << "Max people = " << v.getMaxPeople() << "\n";
cout << "Petrol = " << v.getPetrolAmount() << "\n";
cout << "Tank = " << v.getTankVolume() << "\n";
 
vehicles_on_base = 49;
people_on_base = 84;        // count
petrol_on_base = 1051;      // liters
goods_on_base  = 5.032;     // tons
 
cout << "\nBefore:\n";
cout << vehicles_on_base << "\n";
cout << people_on_base << "\n";
cout << petrol_on_base << "\n";
cout << goods_on_base << "\n";
 
// arrive
v.arrive();
 
cout << "\nArrived Bus:\n";
cout << "People = " << v.getPeopleCount() << "\n";
cout << "Max people = " << v.getMaxPeople() << "\n";
cout << "Petrol = " << v.getPetrolAmount() << "\n";
cout << "Tank = " << v.getTankVolume() << "\n";
 
cout << "\nArrived:\n";
cout << vehicles_on_base << "\n";
cout << people_on_base << "\n";
cout << petrol_on_base << "\n";
cout << goods_on_base << "\n";
 
// leave
assert(v.leave() >= 0);
 
cout << "\nLeft Bus:\n";
cout << "People = " << v.getPeopleCount() << "\n";
cout << "Petrol = " << v.getPetrolAmount() << "\n";
cout << "Tank = " << v.getTankVolume() << "\n";
 
cout << "\nLeft:\n";
cout << vehicles_on_base << "\n";
cout << people_on_base << "\n";
cout << petrol_on_base << "\n";
cout << goods_on_base << "\n";
 
    return 0;
}