//-------------- timer.h --------------

// Declarations of classes Display and Timer

class Display
// A Display object stores and displays a single integer.
// That integer is always in the range 0 .. limit-1, where limit
// is also stored in the class.
{
public:
   Display(int lim);		// Initialize a new Display object.

   void increment();		// Add 1 to value.
   bool setValue(int val);	// Set the value.

   int getValue() const;	// Return the current value.
   int getLimit() const;	// Return the limit

   void show() const;		// Show the current value.

private:
   const int LIMIT;		// largest possible value
   int value;			// current value (0 .. limit - 1)
};

class Timer
// A Timer object consists of two Displays,one for hours and one for minutes.
// When the timer is incremented and minutes becomes 60, minutes is reset
// to 0
//and hours is incremented.
{
public:
   Timer();			// Initialize a new Timer object 00:00
   Timer(int h, int m);		// Initialize a new Timer object
				//   to h hours and m minutes
   void increment();		// Add 1 minute to timer.
   bool set(int h, int m);	// Set Timer to h hours and m minutes

   void show() const;		// Show hours and minutes.

   Timer add(const Timer& t) const;  // add two Timer objects together

private:
   Display hours,		// two displays, one for hours,
           minutes;		// and one for minutes
};