class ABC {
private:
    int* ptr;
public:
    ABC(int x = 0) : ptr(new int(x)) {
        cout << "constructeur" << endl;
    }
    bool operator == (ABC c) {
        return (*ptr == *(c.ptr));
    }
    ~ABC() {
        cout << "destructeur" << *ptr << endl;
        delete ptr;
    }
    ABC& operator=(ABC& other) {
        ptr = new int(*other.ptr);

        return *this;
    }
    ABC(const ABC& a) : ptr(new int(*(a.ptr))) {
        cout << " constructeur de copie " << *(ptr) << endl;
    }
};

int main() {
    /* 1 */ ABC c;
    /* 2 */ ABC c1 = 5;
    /* 3 */ ABC c2;
    /* 4 */ c2 = c1;
    /* 5 */ if (c1 == c2)
        cout << " egaux " << endl;
}