IntCell.h - IntCell class interface (Fig 1.7)
	
	#ifndef IntCell_H_
        #define IntCell_H_

        /**
         * A class for simulating an integer memory cell.
         */
        class IntCell
        {
          public:
            explicit IntCell( int initialValue = 0 );
            int read( ) const;
            void write( int x );
          private:
            int storedValue;
        };

        #endif
