Fig01_16.cpp - IntCell class with pointers and Big Three #include class IntCell { public: explicit IntCell( int initialValue = 0 ); IntCell( const IntCell & rhs ); ~IntCell( ); const IntCell & operator=( const IntCell & rhs ); int read( ) const; void write( int x ); private: int *storedValue; }; IntCell::IntCell( int initialValue ) { storedValue = new int( initialValue ); } IntCell::IntCell( const IntCell & rhs ) { storedValue = new int( *rhs.storedValue ); } IntCell::~IntCell( ) { delete storedValue; } const IntCell & IntCell::operator=( const IntCell & rhs ) { if( this != &rhs ) *storedValue = *rhs.storedValue; return *this; } int IntCell::read( ) const { return *storedValue; } void IntCell::write( int x ) { *storedValue = x; } /* * 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; }