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overloading of operators in C++

Hello everyone, I wanted to know if there's anyone who can help me with this problem:

I'm writing a program in C + + in which I have defined some classes and I did the overloaded operators <<and>> for items related to these classes, but when I compile error: here you put a piece of code:

Code:

class data (public int G,public int M,public int A,

public date ();

void print (oStream & dest) 

{dest <<G <<"/"<< M <<"/"<< A; 

return; 

}
 

void read (IStream & sorg) 

(int day, month, year; 

char sep ='/'; 

sorg>> day>> sep>> months>> sep>> year; 

G = day; 

M = month; 

A = year; 

return; 

)

)
 

class Person: public data 

(public: 

string name; 

SURNAME string; 

birth date; 

ADDRESS string; 

MAIL string; 

person (); 

void print (oStream & dest) 

(dest <<NAME <<endl <<NAME <<endl; 

dest <<BIRTH; 

dest <<endl <<ADDRESS <<endl <<MAIL <<endl <<endl; 

return; 

)
 

void read (IStream & sorg) 

(string name, surname, address, email; 

birth date; 

sorg>> name>> surname; 

sorg>> birth; 

sorg>> address>> email; 

NAME = name; 

SURNAME = surname; 

BIRTH = birth; 

ADDRESS = address; 

MAIL = email; 

return; 

) 

)
 

/ / other classes and various robe ... 

/ / then out of the definition of any class and before opening the main, I wrote:

oStream & operator <<(oStream & dest, const data & x) 

(x.stampa (dest); 

return dest; 

) 

IStream & operator>> (IStream & sorg, data & x) 

(x.leggi (sorg); 

sorg return; 

) 

oStream & operator <<(oStream & dest, const person & x) 

(x.stampa (dest); 

return dest; 

) 

IStream & operator>> (IStream & sorg, person & x) 

(x.leggi (sorg); 

sorg return; 

)

compile time to give me this error:

no match for 'operator <<' in 'dest <<((person) * this) -> person:: BIRTH'

Why? How do I solve this problem?
Thanks in advance to those who answered!

Re: overloading of operators in C++

The next time refers to the code, otherwise you do not understand anything.

Code:

 class data 

  ( 

 public: 

      int G; 

      int M; 

      int A; 

      date (); 

      void print (oStream & dest) 

      ( 

          dest <<G <<"/"<< M <<"/"<< A; 

         return; 

      ) 

      void read (IStream & sorg) 

      ( 

          int day, month, year; 

          char sep ='/'; 

          sorg>> day>> sep>> months>> sep>> year; 

          G = day; 

          M = month; 

          A = year; 

         return; 

      ) 

  ) 

  class Person: public data 

  ( 

 public: 

      string name; 

      SURNAME string; 

      birth date; 

      ADDRESS string; 

      MAIL string; 

      person (); 

      void print (oStream & dest) 

      ( 

          dest <<NAME <<endl <<NAME <<endl; 

          dest <<BIRTH; 

          dest <<endl <<ADDRESS <<endl <<MAIL <<endl <<endl; 

         return; 

      ) 

      void read (IStream & sorg) 

      ( 

          string name, surname, address, email; 

          birth date; 

          sorg>> name>> surname; 

          sorg>> birth; 

          sorg>> address>> email; 

          NAME = name; 

          SURNAME = surname; 

          BIRTH = birth; 

          ADDRESS = address; 

          MAIL = email; 

         return; 

      ) 

  ) 
 

  / / other classes and various robe ... 

  / / then out of the definition of any class and before opening the main, I wrote: 
 

  oStream & operator <<(oStream & dest, const data & x) 

  ( 

      x.stampa (dest); 

      return dest; 

  ) 

  IStream & operator>> (IStream & sorg, data & x) 

  ( 

      x.leggi (sorg); 

      sorg return; 

  ) 

  oStream & operator <<(oStream & dest, const person & x) 

  ( 

      x.stampa (dest); 

      return dest; 

  ) 

  IStream & operator>> (IStream & sorg, person & x) 

  ( 

      x.leggi (sorg); 

      sorg return; 

  )

Missing piece of code where the error, it is impossible to understand.

Re: overloading of operators in C++

ok, you're right ...

the error is on this line of class "person" in the function "print":

Code:

dest <<BIRTH;

Re: overloading of operators in C++

Move those operators <<before the definition of classes.
It is also good use never use variables State capitals. For the reading of the code will also put a space between operators and arguments.