//重载流插入运算符和流提取运算符
//用重载的《进行输出
#include<iostream>

using namespace std;

class Complex
{public:
Complex(){real=0;image=0;}
Complex(int i,int j){real=i;image=j;}
Complex operator +(Complex&c1);
friend ostream& operator<<(ostream&,Complex&c);
void display(){cout<<real<<", "<<image<<endl;
private:
int real;
int image;
}
Complex Complex::operator +(Complex&c1)
{
return Complex(real+c1.real,c1.image+image);
}
ostream& operator << (ostream&output,Complex&c)
{
output<<"( "<<c.real<<" + "<<c.image<<"i)"<<endl;
return output;
}
int main()
{
Complex c2(2,4),c3(3,6),c4;
c4=c2+c3;
cout<<c4;
return 0;
}

--------------------Configuration: chapter10 - Win32 Debug--------------------
Compiling...
pr4.cpp
E:\temp\chapter10\pr4.cpp(19) : error C2535: 'class Complex __thiscall Complex::operator +(class Complex &)' : member function already defined or declared
E:\temp\chapter10\pr4.cpp(11) : see declaration of '+'
E:\temp\chapter10\pr4.cpp(23) : error C2804: binary 'operator <<' has too many parameters
E:\temp\chapter10\pr4.cpp(23) : error C2333: '<<' : error in function declaration; skipping function body
E:\temp\chapter10\pr4.cpp(35) : fatal error C1004: unexpected end of file found
Error executing cl.exe.

chapter10.exe - 4 error(s), 0 warning(s)
本人刚学C++,多多指教了

#include<iostream>

using namespace std;

class Complex
{public:
Complex(){real=0;image=0;}
Complex(int i,int j){real=i;image=j;}
Complex operator +(Complex&c1);
friend ostream& operator<<(ostream&,Complex&c);
void display(){cout<<real<<", "<<image<<endl; }//少了"}"
private:
int real;
int image;
} ;//少了";"
Complex Complex::operator +(Complex&c1)
{
return Complex(real+c1.real,c1.image+image);
}
ostream& operator << (ostream&output,Complex&c)
{
output<<"( "<<c.real<<" + "<<c.image<<"i)"<<endl;
return output;
}
int main()
{
Complex c2(2,4),c3(3,6),c4;
c4=c2+c3;
cout<<c4;
return 0;
}

运行时有以下错误
--------------------Configuration: ch - Win32 Debug--------------------
Compiling...
c.cpp
e:\visual c++ 6.0 cn\msdev98\myprojects\ch\c.cpp(22) : error C2248: 'real' : cannot access private member declared in class 'Complex'
e:\visual c++ 6.0 cn\msdev98\myprojects\ch\c.cpp(13) : see declaration of 'real'
e:\visual c++ 6.0 cn\msdev98\myprojects\ch\c.cpp(22) : error C2248: 'image' : cannot access private member declared in class 'Complex'
e:\visual c++ 6.0 cn\msdev98\myprojects\ch\c.cpp(14) : see declaration of 'image'
e:\visual c++ 6.0 cn\msdev98\myprojects\ch\c.cpp(29) : error C2593: 'operator <<' is ambiguous
Error executing cl.exe.

ch.exe - 3 error(s), 0 warning(s)

你改的还是不对

这样用 #include<iostream.h>

为什么呀

Complex(){real=0;image=0;}
Complex(int i,int j){real=i;image=j;}
Complex operator +(Complex&c1);
为什么写三个重载函数我就不懂了
Complex Complex::operator +(Complex&c1)
这里是不是一个Complex就合适了

不是呀,第一个是无参构造函数,第二个是有参构造函数;第三个是运算符重载,不一样的

2楼的程序可以正确运行呀，你那里不行吗？