运算符 乘号 重载 用来计算复数的问题 ？？

[doudouyeah]

程序如下

#include<iostream>
using namespace std;
class complex
{
public:
complex()
{real=0;image=0;}
complex(int r,int m)
{real=r;image=m;}
complex operator* (complex &a);
void print();
private:
int real;
int image;
};

void complex::print()
{cout<<real<<"+"<<image<<endl;}

complex complex::operator* (complex A,complex B)
{complex a;
a.real=A.real*B.image-A.image*B.real;
a.image=A.real*B.image+A.image*B.real
return a;
}

void main()
{complex v1(2,3);
complex v2(4,5);
complex v3;
v3=v1*v2;
cout<<v3<<endl;
}


错误提示如下 求高手指点。。。

c:\program files\microsoft visual studio\myprojects\ss\dfs.cpp(21) : error C2511: '*' : overloaded member function 'class complex (class complex,class complex)' not found in 'complex'
c:\program files\microsoft visual studio\myprojects\ss\dfs.cpp(4) : see declaration of 'complex'
c:\program files\microsoft visual studio\myprojects\ss\dfs.cpp(32) : error C2679: binary '<<' : no operator defined which takes a right-hand operand of type 'class complex' (or there is no acceptable conversion)
Error executing cl.exe.

[Jalien]

lz注意自己调试，报错其实很明显了。我改好了，lz琢磨一下。

#include <iostream> 
using namespace std; 

class complex 
{ 
public: 
	complex(){
		real=0;
		image=0;
	} 
	complex(int r,int m){
		real=r;
		image=m;
	} 
	friend complex operator*(const complex& A,const complex& B);
	friend ostream& operator<<(ostream& os,complex& a);
	void print(); 
private: 
	int real; 
	int image; 
}; 

void complex::print() {
	cout <<real <<"+" <<image <<endl;
} 

complex operator*(const complex& A,const complex& B) {
	return complex(A.real*B.image-A.image*B.real,A.real*B.image+A.image*B.real); 
} 

ostream& operator<<(ostream& os,complex& a){
	os<<a.real <<"+" <<a.image <<endl;
	return os;
}
void main() {
	complex v1(2,3); 
	complex v2(4,5); 
	complex v3; 
	v3=v1*v2; 
	cout <<v3 <<endl; 
} 

[kang315]

#include <iostream>
using namespace std;
class complex
{
public:
complex()
{real=0;image=0;}
complex(int r,int m)
{real=r,image=m;}
friend complex operator*(complex A,complex B); //这个
void print();
private:
int real;
int image;
};

void complex::print()
{cout <<real <<"+" <<image <<endl;}

complex operator*(complex A,complex B) //zhe
{complex a;
a.real=A.real*B.real-A.image*B.image;
a.image=A.real*B.image+A.image*B.real;
return a;
}

void main()
{complex v1(2,3);
complex v2(4,5);
complex v3;
v3=v1*v2;
v1.print();
v2.print();
v3.print();
//cout <<v3 <<endl;
} 程序 这样改后 貌似可以用了