重载运算符问题？

[lxjjoinly]

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

class A{ 
	char name[32];
	int areacode;
	int prefix;
	int num;
public:
	A(char *s,int i,int j,int k)
	{
		strcpy(name,s);
		areacode = i;
        prefix = j;
		num = k;
	}
	friend ostream &operator<<(ostream &stream,A o);
};
ostream &operator<<(ostream &stream,A o)
{
	stream<<o.name<<" ";
	stream.fill('0');
	stream.width(3);
	stream<<"("<<o.areacode<<") ";
	stream.width(8);
	stream<<o.prefix<<"-";
	stream.width(4);
	stream<<o.num<<endl;
	return stream;
}
int main()
{
	A ob1("AAA",111,22222,333);
	A ob2("BBB",444,55555,666);
	A ob3("CCC",777,88888,999);
	cout<<ob1<<ob2<<ob3;
	return 0;
}

刚想学C++,书上抄了个例程,就编译不了........打击我的信心啊 -_-!!!!!!!!
1.说是不能访问私有变量.......晕,我用的是友元啊
2.说'operator >>'不明确？该怎么改啊,让它能够明确点！！！！哈哈

[lxjjoinly]

哦，谢谢啊，我用的就是VC6.0啊
书名《C++参考大全第四版》

[jameshooo]

把函数原型改写成 ostream &operator<<(ostream &stream,A& o) 试试

[freshairfly]

我编译没问题啊，我的是VC2003

[arfi]

可能是编译器的BUG

将包含的头文件替换为
#include <iostream.h>
#include <string.h>

或者将定义写在类里面，就可以编译通过

[ar_2002]

环境BCB6 没有问题　楼主换个编译器看看

[effective_person]

#include <iostream>
#include <cstring>
using namespace std;
class A{ 
    char name[32];
    int areacode;
    int prefix;
    int num;
public:
    A(char *s,int i,int j,int k)
    {
        strcpy(name,s);
        areacode = i;
        prefix = j;
        num = k;
    }
    friend ostream &operator<<(ostream &stream,A o)
	{
    stream<<o.name<<" ";
    stream.fill('0');
    stream.width(3);
    stream<<"("<<o.areacode<<") ";
    stream.width(8);
    stream<<o.prefix<<"-";
    stream.width(4);
    stream<<o.num<<endl;
       return stream;
	}
};
int main()
{
    A ob1("AAA",111,22222,333);
    A ob2("BBB",444,55555,666);
    A ob3("CCC",777,88888,999);
    cout<<ob1<<ob2<<ob3;
    return 0;
}

楼主应该用的vc6.0
vc6.0 不支持friend 函数再类外定义 最好把函数设为内置函数

[SimonFu]

没问题啊，2003

>>不明确，程序中我咋找不到定位呢

[yydrewdrew]

#include <iostream>
#include <cstring>
using namespace std;
class A;
ostream &operator<<(ostream &stream,A o);
class A
{ 
    char name[32];
    int areacode;
    int prefix;
    int num;
public:
    A(char *s,int i,int j,int k)
    {
        strcpy(name,s);
        areacode = i;
        prefix = j;
        num = k;
    }
    friend ostream &operator<<(ostream &stream,A o);
};

ostream &operator<<(ostream &stream,A o)
{
    stream<<o.name<<" ";
    stream.fill('0');
    stream.width(3);
    stream<<"("<<o.areacode<<") ";
    stream.width(8);
    stream<<o.prefix<<"-";
    stream.width(4);
    stream<<o.num<<endl;
    return stream;
}
int main()
{
    A ob1("AAA",111,22222,333);
    A ob2("BBB",444,55555,666);
    A ob3("CCC",777,88888,999);
    cout<<ob1<<ob2<<ob3;
    return 0;
}

[WeinJones]

晕，哪本书上写这样滴例子啊？