C++<<重载

#include <iostream>
 
 

  #include <string>
 
 

  using namespace std;
 
 

  
 

  class StringBad
 
 

  {
 
 

  private:
 
 
 char *str;
 
 

  public:
 
 
 StringBad(char *value);
 
 
 friend ostream &operator<<(ostream &os,const StringBad &st)
 
 
 {
 
 
 os<<st.str;
 
 
 return os;
 
 
 }
 
 

  };
 
 

  StringBad::StringBad(char *value)
 
 

  {
 
 
 str=value;
 
 

  }
 
 

  int main()
 
 

  {
 
 
 StringBad s("jianghuihong");
 
 
 cout<<s<<endl;
 
 
 return 0;
 
 

  }