利用重載後的運算子求任意兩個數的加減乘除

#include<iostream.h>
class Complex                          //定義一個Complex類
{
private:
 double real;                    //實部
 double imag;                  //虛部
public:
 Complex(){}                                        //定義建構函式
 Complex(double r,double i)                //重載建構函式
 {
  real=r;
  imag=i;
 }
 void display()
 {
  cout<<"("<<real<<","<<imag<<")"<<endl;
 }
 Complex operator+(Complex i2)                  //重載加法運算子
 {
  Complex a;
  a.real=this->real+i2.real;
  a.imag=this->imag+i2.imag;
  return a;
 }
 Complex operator-(Complex i2)                    //重載減法運算子
 {
  Complex b;
  b.real=this->real-i2.real;
  b.imag=this->imag-i2.imag;
  return b;
 }
 Complex operator*(Complex i2)                       //重載乘法運算子
 {
  Complex c;
  c.real=this->real*i2.real;
  c.imag=this->imag*i2.imag;
  return c;
 }
 Complex operator/(Complex i2)                            //重載除法運算子
 {
  Complex d;
  d.real=this->real/i2.real;
  d.imag=this->imag/i2.imag;
  return d;
 }

};
void main()
{

int x1,y1,x2,y2;

cin>>x1>>y1>>x2>>y2;
 Complex a,b,c,d,i1(x1,y1),i2(x2,y2);
 a=i1+i2;                              //  利用重載後的運算子求c1,c2的和
 b=i1-i2;                               //  利用重載後的運算子求c1,c2的差

 c=i1*i2;                               //  利用重載後的運算子求c1,c2的積

 d=i1/i2;                               //  利用重載後的運算子求c1,c2相除

 cout<<"i1=";i1.display();
 cout<<"i2=";i2.display();
 cout<<"i1+i2=";a.display();
 cout<<"i1-i2=";b.display();
 cout<<"i1*i2=";c.display();
 cout<<"i1/i2=";d.display();
}