C++、リロード出力オペレータ<

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

class Student
{
public:
	//  
	void setname(string s){	name = s;}
	void setage(int y){age = y;	}
	void setaddress(string add){address = add;}    
	//  
	string getname(){return name;}
	int getage(){return age;}
	string getaddress(){return address;}
   
	Student(string name="",int age=0,string address="")
	{
		this->name = name; this->age = age; this->address = address;      
	}
	~Student(){}

    
	 //      << :   "operator<<"       ,       ostream       
	friend ostream& operator<< (ostream &os,Student &st)
	{
		os<<st.name<<"------"<<st.age<<"------"<<st.address<<endl;
		return os;
	}
protected:	
private:
	string name;
	int    age;
	string address;
};

void main()
{ 
Student x1("   ",22,"   369 "); 
 cout<<x1; 
//cout<<x1 ---  OK,         ,           ?,x1      ,  cout    operator<< ? 
     

	  /*
	     "<<"        ? C++ Prime P6
		    "     ",     ostream  cout,        
		           cout,           .

	   */

	  //    cout  ostream  ,      .       ostream     
      //    operator<<           ,                ?
       ostream z;
	   cout.operator<<(z,x1);  //      ...
}

//---

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

void main()
{ 
  cout.operator <<("csdn"); // 0046E01,    ?           "csdn"?
}

//---答えは.....
http://topic.csdn.net/u/20121006/15/eba3d438-2f71-4b39-b8d5-f6c4a94e3d1b.html?seed=131699817&r=79821898#r_79821898
 

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

class Student
{
public:
	//  
	void setname(string s){	name = s;}
	void setage(int y){age = y;	}
	void setaddress(string add){address = add;}    
	//  
	string getname(){return name;}
	int getage(){return age;}
	string getaddress(){return address;}
	
	Student(string name="",int age=0,string address="")
	{
		this->name = name; this->age = age; this->address = address;      
	}
	~Student(){}
	
    
	//      << :   "operator<<"       ,       ostream       
	friend ostream& operator<< (ostream &os,Student &st)
	{
		os<<st.name<<"------"<<st.age<<"------"<<st.address<<endl;
		return os;
	}
protected:	
private:
	string name;
	int    age;
	string address;
};

void main()
{ 
	Student x1("   ",22,"   369 "); 
	cout<<x1; 
	//cout<<x1 ---  OK,         ,           ?,x1      ,  cout    operator<< ? 
	//   :cout<<x1       ,               ,        ,       .
	/*
	              ，       this  ，            ，                    ，                 。
	              ：
	  
		operator <   >(<  1>,<  2>)      <  1><   ><  2>
		    1    ostream    cout,  2  x1
	 */
	cout = operator<<(cout,x1); //      ,  	cout = cout<<x1;   OK
	x1.operator<<(cout,x1);  //   !       .            ?   .       .     
	/*
	          ,        ,    :
	                          。            ，
	          ，             ，                 friend，     ：
	   friend        (    );
	   
		                  ，         ，        ，             。
		                ，            。
		                       。 		 

	 *	
	 */
	
	/*
	"<<"        ? C++ Prime P6
	    "     ",     ostream  cout,        
	           cout,           .
	
	*/
	
	//    cout  ostream  ,      .       ostream     
	//    operator<<           ,                ?
    
	   operator<<(cout,x1) ; // ok
	   ostream z(cout);  // ok
	   z<<x1; //    cout<<x1 
	   
	   operator<<(z,x1);  // ok 
	   
	   cout<<"=========================="<<endl;
	   z =  operator<<(z,x1);  //ok
}

 
 //
 

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

void main()
{ 
  cout.operator <<("csdn"); // 0046E01,    ?           "csdn"?
  /*
   cout.operator<<("csdn")         ostream       operator<<(...)，
    ostream     char*       ，      。           operator<<        
  ostream& operator<<(ostream& os, char* str);
        ：   ：     ： cout<<"csdn";
     ：    ：operator<<(cout,"csdn");
   */

  //--
   

}

//---
フォーマット出力:1.メンバー関数:ostream::operator<<,サポート整数(文字タイプを除く),浮動小数点数,bool,const void*など.2.グローバル関数:operator<<(ostream&os,T const&),サポート文字,文字列,カスタムタイプ

#include <iostream>
#include <iomanip>
#include <sstream>
int main()
{
    std::istringstream input(" \"Some text.\" ");
    volatile int n = 42;
    double f = 3.14;
    bool b = true;;
    std::cout << n   // int overload
              << ' ' // non-member overload
              << std::boolalpha << b // bool overload
              << " " // non-member overload
              << std::fixed << f // double overload
              << input.rdbuf() // streambuf overload
              << &n // bool overload
              << std::endl; // function overload
}