#include <string>

#include <sstream>

#include <iostream>

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

class MyComplex

{

private:

double real = 0;

double imag = 0;

public:

MyComplex(double real_ = 0, double imag_ = 0) : real(real_), imag(imag_) {}

MyComplex(const MyComplex &z1)

{

real = z1.real;

imag = z1.imag;

}

string to_string()

{

ostringstream buffer;

buffer << real << " + " << imag << "i";

return string("MyComplex(") + string(buffer.str()) + string(")");

}

MyComplex operator+(const MyComplex &z1) { return MyComplex(real + z1.real, imag + z1.imag); }

MyComplex operator-(const MyComplex &z1) { return MyComplex(real - z1.real, imag - z1.imag); }

MyComplex operator*(const MyComplex &z1)

{

double new_real = real * z1.real - imag * z1.imag;

double new_imag = imag * z1.real + real * z1.imag;

return MyComplex(new_real, new_imag);

}

};

void print_string()

{

cout << endl

<< "test print_string" << endl;

MyComplex z1(3, 5), z2(5, 7), z3;

cout << z1.to_string() << endl;

cout << z2.to_string() << endl;

cout << z3.to_string() << endl;

}

void operator_overload()

{

cout << endl

<< "test operator_overload" << endl;

MyComplex z1(3, 5), z2(5, 7), z3;

cout << z1.to_string() << " + " << z2.to_string() << " = " << (z1 + z2).to_string() << endl;

cout << z1.to_string() << " - " << z2.to_string() << " = " << (z1 - z2).to_string() << endl;

cout << z1.to_string() << " * " << z2.to_string() << " = " << (z1 * z2).to_string() << endl;

}

int main()

{

print_string();

operator_overload();

return 0;

}