C 過載流插入和流輸出運算子

demo:

/*

name: 過載輸入輸出流運算子使力** 
author: zhaozhe
date: 07/12/13 00:11
description: 
首先定義乙個複數類，然後過載輸入，輸出運算子
以及+運算子，以實現複數的輸出，相加和輸出操作 
*/#includeusing namespace std;
class complex
complex(double r,double i)
friend complex operator+(complex &c1,complex &c2);
friend ostream & operator << (ostream &output,complex &c);
friend istream & operator >> (istream &input ,complex &c);
private:
double real;
double imag;
};complex operator+(complex &c1,complex &c2)
ostream & operator << (ostream &output,complex &c)
int main()
{ complex c1,c2,c3;
cout<<"please input c1:";
cin>>c1;
cout<<"please input c2:";
cin>>c2;
c3=c1+c2;
cout<<"c3=c1+c2"<
/*please input c1:3 5
please input c2:2 -1
c3=c1+c2
c1:(3,5)
c2:(2,-1)
c3=c1+c2
c3:(5,4)
*/

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