Спринт 11. Отношения между классами.

#include <iostream>
#include <cassert>
#include <string>

using namespace std;

class House {
public:
    explicit House(int length, int width, int heigth) : length_(length),
                                                        width_(width),
                                                        height_(heigth) {}

    int GetLength() const {
        return length_;
    }

    int GetWidth() const {
        return width_;
    }

    int GetHeight() const {
        return height_;
    }

 private:
    int length_;
    int width_;
    int height_;
};

class Resources {
public:
    Resources(int bricks_count) : bricks_count_(bricks_count) {}

    void TakeBricks(int amount) {

        if ((bricks_count_-amount) < 0 || amount < 0) {//
            throw std::out_of_range("");
        }
        bricks_count_ -= amount;
    }

    int GetBrickCount() const {
        return bricks_count_;
    }

private:
    int bricks_count_;
};

struct HouseSpecification {
    int length = 0;
    int width = 0;
    int height = 0;
};

class Builder {
public:
    Builder(Resources& resources) : resources_(&resources) {}

    House BuildHouse(HouseSpecification specification) {

        if (2 * (specification.length + specification.width) * specification.height * 32 > resources_->GetBrickCount()) {
            throw std::runtime_error("");
        }

        resources_->TakeBricks(2 * (specification.length + specification.width) * specification.height * 32);
        return House(specification.length, specification.width, specification.height);
    }
private:
    Resources* resources_;
};

int main() {
    Resources resources{10000};
    Builder builder1{resources};
    Builder builder2{resources};

    House house1 = builder1.BuildHouse(HouseSpecification{12, 9, 3});
    assert(house1.GetLength() == 12);
    assert(house1.GetWidth() == 9);
    assert(house1.GetHeight() == 3);
    cout << resources.GetBrickCount() << " bricks left"s << endl;

    House house2 = builder2.BuildHouse(HouseSpecification{8, 6, 3});
    assert(house2.GetLength() == 8);
    cout << resources.GetBrickCount() << " bricks left"s << endl;

    House banya = builder1.BuildHouse(HouseSpecification{4, 3, 2});
    assert(banya.GetHeight() == 2);
    cout << resources.GetBrickCount() << " bricks left"s << endl;
}