cppMarksClassExampleCtorDtor

#include <iostream>

class MarksStorage
{
    size_t size;
    int* storage;
public:
    MarksStorage(size_t sizeP) : size{ sizeP }, storage{ new int[sizeP] {} } {std::cout << "Acquire memory for marks!\n"; }
    MarksStorage() : MarksStorage(1) {}

    bool setMark(size_t id, int mark)
    {
        if (id < 0 or id > size - 1 or mark < 1 or mark > 12) { return false; }
        storage[id] = mark;
        return true;
    }

    int getMark(size_t id)
    {
        if (id < 0 or id > size - 1) { return 0; }
        return storage[id];
    }

    void print()
    {
        std::cout << "Marks: ";
        for (int i{ 0 }; i < size; ++i)
        {
            std::cout << storage[i] << ' ';
        }
        std::cout << '\n';
    }

    ~MarksStorage() { delete[] storage; std::cout << "Release memory from marks!\n"; }
};


int main()
{
    MarksStorage ms1{ 4 };

    ms1.setMark(0, 11);
    ms1.setMark(1, 7);
    ms1.setMark(2, 9);
    ms1.setMark(3, 10);

    ms1.print();

    MarksStorage ms2;
    ms2.setMark(4, 11);
    ms2.print();
    ms2.setMark(0, 15);
    ms2.print();
    ms2.setMark(0, 9);
    ms2.print();

    return 0;
}