/* Title     - Time Clock
 * File name - Lab07
 * Programmer- 415 Erich Musick
 * IPO       - Input - The user inputs the time he/she began and finished work
               Processing - The program calculates the amount of time the user
                worked
               Output - The program displays the amout of time the user worked
*/

//---------------------Start Header Files------------------------------------

#include "waittoclose.h"    // Add to project waittoclose.cpp
#pragma hdrstop
//#include "iostream.h"
//#include "apstring.h"     // Add to project apstring.cpp
//#include "randgen.h"      // Add to project randgen.cpp
//#include "apvector.h"     // DO NOT ADD TO PROJECT apvector.cpp
//#include "apmatrix.h"     // DO NOT ADD TO PROJECT apmatrix.cpp

//----------------------End Header Files-------------------------------------

//-------------------------Start Main----------------------------------------
int main() {
  int startHour;                  // Hour user started work
  int startMinute;                // Minute user started work
  int startAllMinutes;            // Time user started work, in minutes
  char colon;                     // Colon separating time user enters
  int endHour;                    // Hour user finished work
  int endMinute;                  // Minute user finished work
  int endAllMinutes;              // Time user finished work, in minutes
  const int minutesInAnHour = 60; // Number of minutes in an hour
  const int minutesInAday = 1440; // Number of minutes in a day
  int minDiffPlusMinInADay;       /* The difference of endAllMinutes and
                                      startAllMinutes, plus minutesInAday */
  int totalMinutesWorked;         // Time worked, in minutes
  int minutesWorked;              // Time worked, minutes part
  int hoursWorked;                // Time worked, hours part
  
  /* Let the user know what the program is about */
  cout << "This program, given the time a person starts and ends work in "
       << "military time,"
       << endl
       << "will calculate the time worked."
       << endl
       << endl;

  /* Prompt the user for the time he/she began working */
  cout << "Start  : ";
  cin >> startHour;
  cin >> colon;
  cin >> startMinute;

  /* Prompt the user for the time he/she finished working */
  cout << "End    : ";
  cin >> endHour;
  cin >> colon;
  cin >> endMinute;

  /* Convert the start hours to minutes and add them to startAllMinutes */
  startAllMinutes = startHour * minutesInAnHour;
  startAllMinutes = startAllMinutes + startMinute;

  /* Convert the end hours to minutes and add them to endAllMinutes */
  endAllMinutes = endHour * minutesInAnHour;
  endAllMinutes = endAllMinutes + endMinute;

  /* Find the total number of minutes worked, even the time passes midnight*/
  minDiffPlusMinInADay = minutesInAday + endAllMinutes - startAllMinutes;
  totalMinutesWorked = minDiffPlusMinInADay % minutesInAday;

  /* Convert the total number of minutes worked to hours and minutes */
  hoursWorked = totalMinutesWorked / minutesInAnHour;
  minutesWorked = totalMinutesWorked % minutesInAnHour;

  /* Output total time worked */
  cout << "Worked : "
       << setfill('0')
       << setw(2)
       << hoursWorked
       << ":"
       << setfill('0')
       << setw(2)
       << minutesWorked
       << endl;
  return 0;
}
//--------------------------End Main-----------------------------------------

/*               LAB07 by 415 ERICH MUSICK   11:25 on Sep 18 2001

This program, given the time a person starts and ends work in military time,
will calculate the time worked.

Start  : 23:15
End    : 07:20
Worked : 08:05

'Esc' closes window.*/

/*               LAB07 by 415 ERICH MUSICK   11:25 on Sep 18 2001

This program, given the time a person starts and ends work in military time,
will calculate the time worked.

Start  : 7:45
End    : 15:15
Worked : 07:30

'Esc' closes window.*/