利用重载后的运算符求任意两个数的加减乘除

#include<iostream.h>
class Complex                          //定义一个Complex类
{
private:
 double real;                    //实部
 double imag;                  //虚部
public:
 Complex(){}                                        //定义构造函数
 Complex(double r,double i)                //重载构造函数
 {
  real=r;
  imag=i;
 }
 void display()
 {
  cout<<"("<<real<<","<<imag<<")"<<endl;
 }
 Complex operator+(Complex i2)                  //重载加法运算符
 {
  Complex a;
  a.real=this->real+i2.real;
  a.imag=this->imag+i2.imag;
  return a;
 }
 Complex operator-(Complex i2)                    //重载减法运算符
 {
  Complex b;
  b.real=this->real-i2.real;
  b.imag=this->imag-i2.imag;
  return b;
 }
 Complex operator*(Complex i2)                       //重载乘法运算符
 {
  Complex c;
  c.real=this->real*i2.real;
  c.imag=this->imag*i2.imag;
  return c;
 }
 Complex operator/(Complex i2)                            //重载除法运算符
 {
  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;                              //  利用重载后的运算符求c1,c2的和
 b=i1-i2;                               //  利用重载后的运算符求c1,c2的差

 c=i1*i2;                               //  利用重载后的运算符求c1,c2的积

 d=i1/i2;                               //  利用重载后的运算符求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();
}