Private Data Access

This is a discussion on Private Data Access within the C++ Programming forums, part of the General Programming Boards category; Say I have a class like this: Code: class Space{ public: Constructor(); // constructor ~Constructor(); private: Kids*P[3]; }; // end ...

  1. #1
    Registered User
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    Oct 2002
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    2

    Private Data Access

    Say I have a class like this:

    Code:
    class Space{
    
    public:
    	Constructor();   // constructor
    	
    	~Constructor();
    	
    
    private:
    	
    	Kids*P[3];
    	
    
    }; // end class Space
    and another class like this
    Code:
    class Kids{
    
    public:
    	Constructor2();   // constructor
    	
    	~Constructor2();
    	
    
    private:
    	
    	      int friends;
                int familyMember;
    
    }
    if i had a member function of class Space how could i print what the array of pointers to class Kids points to from that member function in class Space?

  2. #2
    Confused Magos's Avatar
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    Have a method in Kids that either returns the data, or prints it:
    (the point of private encapsulation is that you cannot (shall not) directly access the data)
    Code:
    class Space
    {
       public:
          Space();	
          ~Space();	
    
       private:	
          Kids* P[3];
    };
    
    class Kids
    {
       public:
          Kids();
          ~Kids();
    
          int getFriends();
          int getFamilyMember();
          void printData();
    
       private:	
          int friends;
          int familyMember;
    }
    Btw, the constructor and the destructor have the same name as the class, not "Constructor".
    MagosX.com

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  3. #3
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    I did what your saying and i sent as one of the parameters to printdata something like this printData(Space A)
    and inside print i did this:

    A.P[index]->friends but it gives me some type of error like segmentation or something

  4. #4
    Confused Magos's Avatar
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    PrintData should print its own values, like this:
    Code:
    void Kids::PrintData()
    {
       cout << friends << endl;
       cout << familyMember << endl;
    }
    Then, in the Space class you have a loop tha runs this method for all your kids objects.
    Code:
    void Space::PrintAllKids()
    {
       for(int i=0; i<NrOfKids; i++)
       {
          P[i].PrintData();
       }
    }
    MagosX.com

    Give a man a fish and you feed him for a day.
    Teach a man to fish and you feed him for a lifetime.

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