#include <iostream>

using std::cin, std::cout, std::endl;

class CS0

{

private:

int x, y;

public:

CS0(int x_ = 0, int y_ = 0) : x(x_ + 3), y(y_ + 3) { cout << "call CS0(int: " << x_ << "," << y_ << "): (" << x << "," << y << ")" << endl; }

CS0(const CS0 &z1) : x(z1.x + 5), y(z1.y + 5) { cout << "call CS0(CS0 &:" << z1.x << "," << z1.y << "): (" << x << "," << y << ")" << endl; }

CS0 &operator=(const CS0 &z1);

int sum(int z);

void hf1(CS0 &z1) {cout << "call CS0::hf1(CS0&: " << z1.x << "," << z1.y << ")" << endl;}

void hf2(CS0 z1) {cout << "call CS0::hf2(CS0: " << z1.x << "," << z1.y << ")" << endl;}

CS0 hf3();

};

CS0 &CS0::operator=(const CS0 &z1)

{

x = z1.x + 7;

y = z1.y + 7;

cout << "call &operator=(CS0 &" << z1.x << "," << z1.y << "): (" << x << "," << y << ")" << endl;

return *this;

}

int CS0::sum(int z = 11)

{

cout << "call CS0::sum(int " << z << ")" << endl;

return x + y + z;

}

CS0 CS0::hf3()

{

cout << "call CS0::hf3()" << endl;

return *this;

}

// g++ draft_class.cpp -std=c++17 -o tbd00.exe

int main(int argc, char *argv[])

{

cout << endl

<< "test basic_class" << endl;

CS0 z1 = 2;

cout << endl;

cout << "sizeof(z1): " << sizeof(z1) << endl;

cout << "sizeof(int): " << sizeof(3) << endl;

cout << endl;

CS0 *pz1 = &z1;

cout << "CS0* -> sum(): " << pz1->sum() << endl;

cout << "(*CS0*).sum(): " << (*pz1).sum() << endl;

CS0 &rz1 = z1;

cout << "CS0& .sum(): " << rz1.sum() << endl;

cout << "CS0(3, 5).sum(7): " << CS0(3, 5).sum(7) << endl;

cout << endl;

z1 = 13;

cout << endl;

z1.hf1(z1);

cout << endl;

z1.hf2(z1);

cout << endl;

CS0 Z2(z1.hf3());

cout << endl;

CS0 z3[3] = {3, 5, CS0(7, 11)};

cout << endl;

CS0 *z4[2] = {new CS0(), new CS0(3, 5)};

// std::vector<CS0> z0 {CS0(), CS0(3,5)};

delete z4[0];

delete z4[1];

CS0 *z5 = new CS0[2];

delete z5;

cout << endl;

return 0;

}