好吧，我又来了

[h248080441]

程序修改后又出来了个问题
'*' : modifiers not allowed on nonmember functions
'~' : modifiers not allowed on nonmember functions



#ifndef COMPLEX0_H_
#define COMPLEX0_H_
#include <iostream>
class complex
{
private:
double x;
double y;
public:
complex();
complex(double a,double b);
complex operator+ (const complex &t)const;
complex operator- (const complex &t)const;
complex operator* (const complex &t)const;
friend complex operator* (const complex &t,double c)const;
friend complex operator~ (const complex &t)const;
friend std::ostream & operator<< (std::ostream & os,const complex &t);
};
#endif



#include "complex0.h"
complex::complex()
{
x=0;
y=0;
}
complex::complex(double a,double b)
{
x=a;
y=b;
}
complex complex::operator+ (const complex &t)const
{
complex d;
d.x=x+t.x;
d.y=y+t.y;
return d;
}
complex complex::operator- (const complex &t)const
{
complex d;
d.x=x-t.x;
d.y=y-t.y;
return d;
}
complex complex::operator* (const complex &t)const
{
complex d;
d.x=x*t.x-y*t.y;
d.y=x*t.y+y*t.x;
return d;
}
complex operator* (const complex &t,double c)const
{
complex d;
d.x=c*t.x;
d.y=c*t.y;
return d;
}
complex operator~ (const complex &t)const
{
complex d;
d.x=t.x;
d.y=-t.y;
return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
os<<"("<<t.x<<","<<t.y<<"i"<<")";
return os;
}

#include "complex0.h"
complex::complex()
{
x=0;
y=0;
}
complex::complex(double a,double b)
{
x=a;
y=b;
}
complex complex::operator+ (const complex &t)const
{
complex d;
d.x=x+t.x;
d.y=y+t.y;
return d;
}
complex complex::operator- (const complex &t)const
{
complex d;
d.x=x-t.x;
d.y=y-t.y;
return d;
}
complex complex::operator* (const complex &t)const
{
complex d;
d.x=x*t.x-y*t.y;
d.y=x*t.y+y*t.x;
return d;
}
complex operator* (const complex &t,double c)const
{
complex d;
d.x=c*t.x;
d.y=c*t.y;
return d;
}
complex operator~ (const complex &t)const
{
complex d;
d.x=t.x;
d.y=-t.y;
return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
os<<"("<<t.x<<","<<t.y<<"i"<<")";
return os;
}

错误出现在
friend complex operator* (const complex &t,double c)const;
friend complex operator~ (const complex &t)const;
又晕了，有请大神们

[baihacker]

friend complex operator* (const complex &t,double c);
friend complex operator~ (const complex &t);
尾巴别带const

complex complex::operator* (const complex &t)
{
complex d;
d.x=x*t.x-y*t.y;
d.y=x*t.y+y*t.x;
return d;
}

这个？？？

[liutengfeigo]

建议楼主去学会结贴～

[phpjspasp]

[Quote=引用 1 楼 baihacker 的回复:]

friend complex operator* (const complex &t,double c);
friend complex operator~ (const complex &t);
尾巴别带const

complex complex::operator* (const complex &t)
{
complex d;
d.x=x*t.x-y……
[/Quote]
为啥我的编译器还报错，编译器的意思是友元无法访问private成员 。

[baihacker]

啥编译器？

[baihacker]

啥编译器？

[phpjspasp]

[Quote=引用 5 楼 baihacker 的回复:]

啥编译器？
[/Quote]
g++ 4.3.4
友元后的const我已经去掉了。编译器说友元函数中访问private成员的那些行报错。把private改成public就没错了。

[phpjspasp]

#include <iostream>
class complex
{
    friend complex operator* (const complex &t,double c);
    friend complex operator~ (const complex &t);
    friend std::ostream & operator<< (std::ostream & os,const complex &t);
private:
    double x;
    double y;
public:
    complex();
    complex(double a,double b);
    complex operator+ (const complex &t)const;
    complex operator- (const complex &t)const;
    complex operator* (const complex &t)const;

};

complex::complex()
{
    x=0;
    y=0;
}
complex::complex(double a,double b)
{
    x=a;
    y=b;
}
complex complex::operator+ (const complex &t)const
{
    complex d;
    d.x=x+t.x;
    d.y=y+t.y;
    return d;
}
complex complex::operator- (const complex &t)const
{
    complex d;
    d.x=x-t.x;
    d.y=y-t.y;
    return d;
}
complex operator* (const complex &s, const complex &t)///
{
    complex d;
    d.x=s.x*t.x-s.y*t.y;
    d.y=s.x*t.y+s.y*t.x;
    return d;
}
complex operator* (const complex &t,double c)
{
    complex d;
    d.x=c*t.x;
    d.y=c*t.y;
    return d;
}
complex operator~ (const complex &t)
{
    complex d;
    d.x=t.x;
    d.y=-t.y;
    return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
    os<<"("<<t.x<<","<<t.y<<"i"<<")";
    return os;
}
int main()
{
}

被我改成了这样，所有的友元函数定义里都报错。

[baihacker]

complex operator* (const complex &s, const complex &t)///
{
complex d;
d.x=s.x*t.x-s.y*t.y;
d.y=s.x*t.y+s.y*t.x;
return d;
}

这个不是友元，你没有用friend搞过。
要么去掉，要把在class里加上：
friend complex operator* (const complex &s, const complex &t);

[phpjspasp]

//还是friend 里，访问private成员报错。、
#include <iostream>
class complex
{
    friend complex operator* (const complex &t,double c);
    friend complex operator~ (const complex &t);
    friend std::ostream & operator<< (std::ostream & os,const complex &t);
private:
    double x;
    double y;
public:
    complex();
    complex(double a,double b);
    complex operator+ (const complex &t)const;
    complex operator- (const complex &t)const;
    complex operator* (const complex &t)const;
};

complex::complex()
{
    x=0;
    y=0;
}
complex::complex(double a,double b)
{
    x=a;
    y=b;
}
complex complex::operator+ (const complex &t)const
{
    complex d;
    d.x=x+t.x;
    d.y=y+t.y;
    return d;
}
complex complex::operator- (const complex &t)const
{
    complex d;
    d.x=x-t.x;
    d.y=y-t.y;
    return d;
}
complex operator* (const complex &t)const //明明是member fuction，编译器说这不是member function
{
    complex d;
    d.x=x*t.x-y*t.y;
    d.y=x*t.y+y*t.x;
    return d;
}
complex operator* (const complex &t,double c)
{
    complex d;
    d.x=c*t.x;
    d.y=c*t.y;
    return d;
}
complex operator~ (const complex &t)
{
    complex d;
    d.x=t.x;
    d.y=-t.y;
    return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
    os<<"("<<t.x<<","<<t.y<<"i"<<")";
    return os;
}
int main()
{
}

[baihacker]

#include <iostream>
class complex
{
    friend complex operator* (const complex &t,double c);
    friend complex operator~ (const complex &t);
    friend std::ostream & operator<< (std::ostream & os,const complex &t);
private:
    double x;
    double y;
public:
    complex();
    complex(double a,double b);
    complex operator+ (const complex &t)const;
    complex operator- (const complex &t)const;
    complex operator* (const complex &t)const;
	friend complex operator* (const complex &t,double c);
	/*
	
	
	notice here
	
	
	*/
};

complex::complex()
{
    x=0;
    y=0;
}
complex::complex(double a,double b)
{
    x=a;
    y=b;
}
complex complex::operator+ (const complex &t)const
{
    complex d;
    d.x=x+t.x;
    d.y=y+t.y;
    return d;
}
complex complex::operator- (const complex &t)const
{
    complex d;
    d.x=x-t.x;
    d.y=y-t.y;
    return d;
}
	/*
	
	
	notice here
	
	
	*/
complex complex::operator* (const complex &t)const //明明是member fuction，编译器说这不是member function
{
    complex d;
    d.x=x*t.x-y*t.y;
    d.y=x*t.y+y*t.x;
    return d;
}
complex operator* (const complex &t,double c)
{
    complex d;
    d.x=c*t.x;
    d.y=c*t.y;
    return d;
}
complex operator~ (const complex &t)
{
    complex d;
    d.x=t.x;
    d.y=-t.y;
    return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
    os<<"("<<t.x<<","<<t.y<<"i"<<")";
    return os;
}
int main()
{
}

[phpjspasp]

[Quote=引用 10 楼 baihacker 的回复:]

C/C++ code
#include <iostream>
class complex
{
friend complex operator* (const complex &t,double c);
friend complex operator~ (const complex &t);
friend std::ostream & operat……
[/Quote]
知道了，少写了个complex::

[genlic]

楼主记得结贴啊，呵呵。