error C2593: 'operator <<' is ambiguous

#include <iostream>  
using namespace std;  
  
class Test  
{  
  public:  
  Test(int age = 0,char *name = "\0")  
  {  
  Test::age = age;  
  strcpy(Test::name,name);  
  }  
  void outmembers(ostream &out)  
  {  
  out<<"Age："<<age<<endl<<"Name："<<this->name<<endl;  
  }  
  friend ostream& operator <<(ostream& ,Test&);  
  protected:  
  int age;  
  char name[50];  
};  
ostream& operator <<(ostream& out,Test &temp)  
{  
  temp.outmembers(out);  
  return out;  
}  
int main()  
{  
  Test a(24,"管宁");  
  cout<<a;  
  system("pause");
return 0;
}
会出现
 error C2593: 'operator <<' is ambiguous
Error executing cl.exe.

date22_1.obj - 1 error(s), 0 warning(s)
错误，是编译器的问题吗？

既然你重载了 << ,
干嘛还弄个outmembers
把outmembers的代码copy到operator <<,删掉outmembers()
你叫outmembers()掉用你重载的<<的还是调用原来的呢？编译器怎么判断
如果outmembers()调用operator <<
operator <<又调用 outmembers 这也可以死循环哈

表示在vs2008上编的过

这个不会陷入死循环，调用哪个<<要看<<后的参数，在它的outmembers里，没有使用Test作为<<的第二个参数，所有不会

C/C++ code

#include <iostream>   
using std::ostream;  
using std::cout;
using std::endl; 
class Test
{   
public:   
  Test(int age = 0,char *name = "\0")   
  {   
  Test::age = age;   
  strcpy(Test::name,name);   
  }   
  void outmembers(ostream &out)   
  {   
  out<<"Age："<<age<<endl<<"Name："<<this->name<<endl;   
  }   
  friend ostream& operator <<(ostream& ,Test&);   
protected:   
  int age;   
  char name[50];   
};   
ostream& operator <<(ostream& out,Test &temp)   
{   
  temp.outmembers(out);   
  return out;
}   
int main()   
{   
  Test a(24,"管宁");   
  cout<<a;  
  system("pause");
  return 0;
}

这样就可以了,你用using namespace std里面已经包含了对<<定义,你继续重载<<,就会出现使用模糊的错误了

up

是滴~~