programming-examples/c++/Others/BuggyIntCell.cpp - Buggy IntCell class implementat.cpp

BuggyIntCell.cpp - Buggy IntCell class implementation (Figs 1.14 and 1.15)
	
	#include <iostream.h>

        /**
         * Figure 1.14: missing the big three is a bug here.
         */
        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;
        };


        /*
         * Figure 1.15.
         */
        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;
        }