public and private

This is a discussion on public and private within the C++ Programming forums, part of the General Programming Boards category; hi, i'm a newbie in C++. after going through a reference, i still can't understand how to get and set ...

  1. #1
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    public and private

    hi,

    i'm a newbie in C++. after going through a reference, i still can't understand how to get and set the variables on private. can someone please explain to me.(with an example will be good.)
    thanks.

  2. #2
    the hat of redundancy hat nvoigt's Avatar
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    To have a private variable in a class, declare it after the "private:" part. To access it inside your class, just handle it as a normal variable. You cannot access it from outside your class, that's the whole purpose behind the private keyword.
    hth
    -nv

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  3. #3
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    here's an example:

    Code:
    class returnnumber
    {
          private: 
          float pi = 3.1428;
          public:
          int century = 100;
    };
    and you can put a lot of code in the middle if you want..

    www.akilla.tk

  4. #4
    TK
    Guest
    You should always make data within the class private, never protected or public.

  5. #5
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    PHP Code:
    class returnnumber
    {
          private: 
          
    float pi 3.1428;
          
    int x;
          public:
          
    int century 100;
          
    returnnumber() {}   // default constructor
          
    returnnumber(z) {setX(z)}   // overidden constructor
          
    void setX(int y) {y;} 
          
    int getX() {return x;};
    };

    int main()
    {
         
    returnnumber a;   // declares object named a of class
                            // returnnumber, but value of x in a is undefined
         
    returnnumber(10b;   // declares object named b of class 
                          // returnnumber with value of 10 in x
         
    a.setX(5);   // x now = 5 
    Last edited by salvelinus; 07-10-2002 at 06:44 AM.
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  6. #6
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    class myclass{
    int i,j; /*these are the private variables or functions */
    public: //after here goes the public variables

    int age(); //these are public variables or functions
    int speed();
    }];
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