重载输入输出流：Overload Ostream And Istream

最新推荐文章于 2025-01-07 15:55:31 发布

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#class #os #include

本文介绍了一个使用C++模板类实现的复数类，该类支持基本的复数运算如加法，并提供了输入输出操作符以方便显示复数。通过实例演示了如何创建和操作复数对象。

#include "stdafx.h"
#include<iostream>
using namespace std;

template<class T>
class complex
{
template<class T>
friend ostream& operator<<(ostream& os,complex<T>& z);
template<class T>
friend istream& operator>>(istream& ist,complex<T>& z);
private:
T img;
T real;
public:
complex(T r,T i):real(r),img(i)
{}
complex():img(0),real(0)
{}
~complex(void)
{}
complex operator+(const complex& z)
{
  return complex(real+z.real,img+z.img);
}
void operator=(const complex& z)
{
  real=z.real;
  img=z.img;
}
};

template <class T>
ostream& operator<<(ostream& os,complex<T>& z)
{
os<<"("<<z.real<<","<<z.img<<")"<<endl;
return os;
}

template <class T>
istream& operator>>(istream& ist,complex<T>& z)
{
cout<<"the real is ";
ist>>z.real;
cout<<" the img is ";
ist>>z.img;
return ist;
}
int _tmain(int argc, _TCHAR* argv[])
{
complex<int> z1(1,2),z2(3,4),z3;
z3=z1+z2;
cout<<"z3 is "<<z3<<endl;
cin>>z3;
cout<<"z3 is "<<z3<<endl;
return 0;
}