/*                            CSC15 Lab 8
  
    For this lab you will write a class that will form the
computational part of a program that displays a countdown timer.  The
most important function of the class will involve a nested loop that
decrements the timer appropriately.


0.  download this file (timer.C) and the graphical component (timergui.C)
    from the class homepage.
1.  do "moc timergui.C -o timergui.moc" (only once)
2.  Using the following code as template, define the class.  PLEASE NOTE
    that this class is NOT the same as the time class we studied before.
    Instead of minutes and seconds, this class needs to have 4 variables
    (m1,m0,s1,s0) because the graphical display shows the time using four
    separately managed digits.  The minute value will consist of digits
    m1 and m0, with m1 ranging from 0 to 5 and m0 ranging from 0 to 9, and
    similarly for s1 and s0. Additional instructions in comments below.
3.  Two functions, displayUpdate(int m1, int m0, int s1, int s0) and
    delay(int approx_millesconds) have been predefined.  The first one 
    updates the graphical display with the parameters passed to it.  The
    second one delays by a number of milliseconds.  The exact time is 
    approximate, so you'll NEED TO adjust it so that your timer synchronizes
    with real time.  (i.e., it should really work).

Example:

displayUpdate(3,4,3,0); will display 34 minutes and 30 seconds
delay(1000);   will delay NOT EXACTLY 1000 milliseconds.

Hand in:
paper sketch of start function
printout of your code.  

 Check the class web page in case I come up with improvements to the GUI.
*/


/* template: no extra #include's needed */

// the next 2 lines are 'prototypes': promises that functions will be defined
//   later  (in timergui.C).  Ignore for now
void displayUpdate(int,int,int,int);   // ignore
void delay(int);                       // ignore

class timer
{
private:

  // declare integer variables m1, m0, s1, s0 as explained above
  // declare a boolean variable called running

public:

  // define a constructor that intializes m1,m0,s1,s0 with parameters
  // The constructor should check that the values are appropriate
  // (i.e, if s1 is >=6, set it to be the max possible value - 5)
  // The constructor should also intialize running to false.


  // define a method called "reset" that sets running to false, waits
  // for 100 milliseconds using the delay function, and call displayUpdate
  // before exiting.  Does this function need any parameters?  return any
  // values?  Don't know? Ask.


  // define a "start" function.  This function will be the principal
  // portion of the assignment.  It should count down from the values
  // the user typed in towards zero using a nested loops (4 levels).
  // In the body of the innermost loop, you need to call displayUpdate and
  // delay after updating the appropriate (s0) value.
  // Before starting the loop, set running to true.  At the end of
  // everything, set running to false.  Your while loops should all terminate
  // if running ever gets changed to false in the middle.

}; // end class timer

// don't touch the line below!!!!!!
#include "timergui.C"