重载运算符

#include<iostream>
using namespace std;
class Complex
{
  private:
    double real;//定义复数的实部; 
    double imag;//定义复数的虚部; 
  public:
    Complex();//声明构造函数; 
    Complex(double r,double i);//声明函数的重载; 
    Complex complex_add(Complex &t);//声明实现复数相加的函数,引用变量(对变量的修改等同于对本身的修改) 
    void display();
};
int main()
{
  Complex t1(1,2);
  Complex t2(3,4);
  Complex t3;
  t3=t1.complex_add(t2);//引用对象t2 
  cout<<"t1="<<ends;
  t1.display();
  cout<<"t2="<<ends;
  t2.display();
  cout<<"t1+t2"<<ends;
  t3.display();
  return 0;
}
Complex::Complex()
{
  real=0;
  imag=0;
}
Complex::Complex(double r,double i)
{
  real=r;
  imag=i;
}
Complex Complex::complex_add(Complex &t)  
{
  Complex t4;
  t4.real=this->real+t.real;//this指针是指向本类对象的一个指针,它的值为被调用的成员函数所在对象的地址; 
  t4.imag=this->imag+t.imag;//这里即指:t1,即调用函数的那个对象; 
  return t4;
}
void  Complex::display()
{
  cout<<"("<<real<<","<<imag<<"i)"<<endl;
}