Программа (class Complex) на неуправляемом языке c++

class Complex
{
private:
    double x, y;
public:
    Complex();
    Complex(double, double);
    Complex(Complex &);
    void assign(Complex&);
    friend void print(Complex&);
    friend Complex plus(Complex&, Complex&);
};

#include <iostream>
#include <conio.h>
#include "1.h"
using namespace std;
Complex::Complex() :x(0.0), y(0.0)
{}
Complex::Complex(double x1, double y1) : x(x1), y(y1)
{}
 
Complex::Complex(Complex &temp_obj)
{
    x = temp_obj.x;
    y = temp_obj.y;
}
 
Complex plus(Complex &c1, Complex &c2)
{
    double x_temp, y_temp;
    x_temp = c1.x + c2.x;
    y_temp = c1.y + c2.y;
    return Complex(x_temp, y_temp);
}
 
void Complex::assign(Complex &c1_res)
{
    x = c1_res.x;
    y = c1_res.y;
}
 
void print(Complex &c1_show)
{
    cout << "x=" << c1_show.x << endl << "y=" << c1_show.y << endl;
}
 
 
int main()
{
    setlocale(0, "Rus");
 
    Complex x(1.3, 4.2), y(4.0, 8.1), z(y);
    z.assign(plus(x, y));
    print(plus(y, z));
 
    getch();
    return 0;
}

z.assign(plus(x, y));
    print(plus(y, z));

namespace MyNameSpace
{
   class Test 
   { 
   public:
      Test(int value):m_val(value){}
      friend Test plus(const Test & t1, const Test & t2);
      friend void print(const Test & t);
   private:
      int m_val;
      
   };
 
   Test plus(const Test & t1, const Test & t2)
   {
      return Test(t1.m_val + t2.m_val);
   }
 
   void print(const Test & t)
   {
      cout << t.m_val << endl;
   }
}
 
int main()
{
   
   MyNameSpace::Test t1(100);
   MyNameSpace::Test t2(200);
   MyNameSpace::print(MyNameSpace::plus(t1,t2));
 
return 0;
}

int main()
{
    setlocale(0, "Rus");
 
    Complex x(1.3, 4.2), y(4.0, 8.1), z(y);
    z.assign(plus(x, y));
    print(plus(y, z));
 
    getch();
    return 0;
}

#include <iostream>
#include <conio.h>
#include "1.h"
using namespace std;
Complex::Complex() :x(0.0), y(0.0)
{}
Complex::Complex(double x1, double y1) : x(x1), y(y1)
{}
 
Complex::Complex(Complex &temp_obj)
{
    x = temp_obj.x;
    y = temp_obj.y;
}
 
Complex plus(Complex &c1, Complex &c2)
{
    double x_temp, y_temp;
    x_temp = c1.x + c2.x;
    y_temp = c1.y + c2.y;
    return Complex(x_temp, y_temp);
}
 
void Complex::assign(Complex &c1_res)
{
    x = c1_res.x;
    y = c1_res.y;
}
 
void print(Complex &c1_show)
{
    cout << "x=" << c1_show.x << endl << "y=" << c1_show.y << endl;
}

int main()
{
    setlocale(0, "Rus");
 
    Complex x(1.3, 4.2), y(4.0, 8.1), z(y);
    z.assign(plus(x, y));
    print(plus(y, z));
 
    getch();
    return 0;
}

#include "1.h"

class Complex
{
private:
    double x, y;
public:
    Complex();
    Complex(double, double);
    Complex(Complex &);
    void assign(Complex&);
    friend void print(Complex&);
    friend Complex plus(Complex&, Complex&);
};