class Complex{
   public:
     double real,imag;
     Complex(double r=0;doubble i=0)
     {
      real = r;
      imag = i;
     } 
}; 
 Complex operator+(Complex om1,Complex om2)
 {
   Complex temp;
   temp.real = om1.real+om2.real;
   temp.imag = om1.imag+om2.imag;
   return temp;
 }        

 int main()
   {
     Complex com1(1.1,2.2),com2(3.3,4.4),total;
   //total = com1+com2;
   //total = operator+(com1,com2);
     return 0; 
   }
   //上述两个注释语句是等价的，显然前者更简单明了。

#include<iostream>
using namespace std;
 class Complex{
   public:
     double real,imag;
     Complex(double r=0,double i=0)
     {
      real = r;
      imag = i;
     } 
}; 
 Complex operator+(Complex om1,Complex om2)  //定义运算符+的重载函数 
 {
   Complex temp;
   temp.real = om1.real+om2.real;
   temp.imag = om1.imag+om2.imag;
   return temp;
 }
int main(int argc, char** agrv)
{
  Complex com1(1.1,2.2),com2(3.3,4.4),total1,total2;
  total1 = com1+com2;                  //调用运算符重载函数operator的第一种方式  
  cout<<"total1.real="<<total1.real<<","<<"total1.imag="<<total1.imag<<endl;
  total2 = operator+(com1,com2);     //调用运算符重载函数operator的第二种方式
  cout<<"total2.real="<<total2.real<<","<<"total2.imag="<<total2.imag<<endl;
  return 0; 
}