我写的友元函数为什么不能访问私有成员，请指出错误，谢谢

[freezhATsis]

为什么写成friends函数还是不能访问private成员

请指出我写的程序的错误，谢谢！

////////////////////////////////////////
#include<iostream>
using namespace std;

class test
{
	private:
		int x,y;
	public:
		test(int i,int j){
			x = i;
			y = j;
		}
		~test(){}
		friend ostream& operator<<(ostream& stream,test ob);
};

ostream& operator<<(ostream& stream,test ob){
	stream<<ob.x<<","<<ob.y<<endl;
	return stream;
}

int main()
{
	test a(5,6),b(20,23);
	cout<<a<<endl<<b<<endl;
	
	return 0;
}

///////////////////////////////
错误为：

ostream.cpp(24) : error C2248: 'x' : cannot access private member declared in class 'test'
        ostream.cpp(13) : see declaration of 'x'
ostream.cpp(24) : error C2248: 'y' : cannot access private member declared in class 'test'
        ostream.cpp(13) : see declaration of 'y'
ostream.cpp(31) : error C2593: 'operator <<' is ambiguous

[wanjingwei]

vc6的bug

[zgjxwl]

把友元函数的实现写在类里。。。这是VC6的bug

具体其他解决办法。。。可以看我的blog里有篇文章。

[mstlq]

vc6的bug……
下面是一种绕过bug的方法……

#include<iostream>
using namespace std;

class test
{
    private:
        int x,y;
    public:
        test(int i,int j){
            x = i;
            y = j;
        }
        ~test(){}
        void print(ostream& stream);
};
void test::print(ostream& stream)
{
    stream<<x<<","<<y<<endl;
};
ostream& operator<<(ostream& stream,test ob){
    ob.print(stream);
    return stream;
}

int main()
{
    test a(5,6),b(20,23);
    cout<<a<<endl<<b<<endl;
    return 0;
}

[mstlq]

连友元我都不想用……

[freezhATsis]

[Quote=引用 2 楼 zgjxwl 的回复:]
把友元函数的实现写在类里。。。这是VC6的bug

具体其他解决办法。。。可以看我的blog里有篇文章。
[/Quote]

你blog里的方法很管用，谢谢！