### Example of Pointers to Members

    /************************************************************************
    *

Pointers to members can be declared and used as shown in the following example:

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    ************************************************************************/

    // This example illustrates pointers to members.

    #include <iostream.h>
    class X
    {
    public:
          int a;
          void f(int b)
          {
                 cout << "The value of b is "<< b << endl;
          }
    };
    //      .
    //      .
    //      .
    void main ()
    {
          // declare pointer to data member
          int X::*ptiptr = &X::a;

          // declare a pointer to member function
          void (X::* ptfptr) (int) = &X::f;

          X xobject;                  // create an object of class type X
          xobject.*ptiptr = 10;       // initialize data member

          cout << "The value of a is " << xobject.*ptiptr << endl;
          (xobject.*ptfptr) (20);     // call member function
    }

    /************************************************************************
    *

The output for this example is:

    The value of a is 10
    The value of b is 20

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    ************************************************************************/