#ifdef USE_DOT_H
    #include <iostream.h>
#else
    #include <iostream>
    #if !defined( __BORLANDC__ ) || __BORLANDC__ >= 0x0530
        using namespace std;      // Borland 5.0 has a bug
    #endif
#endif


// Incorrect version of IntCell, with shallow copies of storedValue, and a test program.

class IntCell
{
  public:
    explicit IntCell( int initialValue = 0 )
      { storedValue = new int( initialValue ); }

    int read( ) const
      { return *storedValue; }
    void write( int x )
      { *storedValue = x; }
  private:
    int *storedValue;
};


int f( )
{
    IntCell a( 2 );
    IntCell b = a;
    IntCell c;

    c = b;
    a.write( 4 );
    cout << a.read( ) << endl << b.read( ) << endl
         << c.read( ) << endl;
    return 0;
}


int main( )
{
    f( );
    return 0;
}