Implementation of the "C + +" plural class

#include <iostream>using namespace Std;class complex{private:double _real; double _image;public:complex (double  Real = 2.2,double image=1.1)//constructor {cout<< "constructor called" <<endl;  _real = Real; _image = image;  } Complex (const complex& D)//copy constructor {cout<< "copy constructor called" <<endl;  This->_real = D._real; This->_image = D._image;  } ~complex () {cout<< "destructor called" <<endl;} void Display () {cout<< "Real:" <<_real; cout<< "Image:" <<_image<<endl;}   public:complex& operator= (const complex& D) {if (This! = &d) {cout<< "assignment operator is overloaded" <<endl;   This->_real = D._real;  This->_image = D._image; } return *this;  } complex& operator++ () {cout<< "front + + is overloaded" <<endl;  this->_real++; return *this;  } Complex operator++ (int) {cout<< "Post + + is overloaded" <<endl;  Complex *tmp = this;  this->_real++; return *tmp; } complex& operator--() {cout<< "front-overloaded" <<endl;  This->_real--; return *this;  } Complex operator--(int) {cout<< "post-overloaded" <<endl;  Complex *tmp = this;  This->_real--; return *tmp;  } Complex operator+ (const complex& D) {cout<< "+ overloaded" <<endl;  Complex tmp;  Tmp._real = This->_real + d._real;  Tmp._image = This->_image + d._image; return TMP;  } Complex operator-(const complex& D) {cout<< "-overloaded" <<endl;  Complex tmp;  Tmp._real = This->_real-d._real;  Tmp._image = this->_image-d._image; return TMP;  } complex& operator-= (const complex& D) {cout<< "-= is overloaded" <<endl;  This->_real-= D._real;  This->_image-= D._image; return *this;  } complex& operator+= (const complex& D) {cout<< "+ = is overloaded" <<endl;  This->_real + = D._real;  This->_image + = D._image; return *this;  } Complex operator* (const complex& D) {Complex tmp;  Tmp._real = this->_real * D._real-this->_image * d._image; Tmp._image = This->_Image * D._real + this->_real * d._image; return TMP;  } Complex operator/(const complex& D) {Complex tmp;  Tmp._real = (This->_real * d._real + this->_image * d._image)/(D._real * d._real +d._image * d._image);  Tmp._image = (This->_image * d._real-this->_real * d._image)/(D._real * d._real +d._image * d._image); return TMP; }}; int main () {Complex D1; D1. Display (); Complex D2 (D1); Complex d2 = D1; D2. Display (); Complex D3 (4.4,5.5); D3. Display (); D3 = D2; D3.    Display (); ++D3; D3. Display (); d3++; D3. Display (); --D3; D3. Display (); d3--; D3. Display (); System (pause); D3 = D3+D1; D3. Display (); D3 = D3-D1; D3. Display ();    D3-=D1; D3. Display (); GetChar (); return 0;}

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Implementation of the "C + +" plural class