//============================================================
// SOLUTION TO HOMEWORK 2!
//============================================================
// HOMEWORK 2
//------------------------------------------------------------
// DUE DATE: Monday, 3/6/2006
//============================================================
//
// Below is the outline for the declaration and implementation
// of a class Time. Note that this is very similar to the 
// example of the class Date we discussed during class.
//
// Complete the missing parts by:
//
//   - Adding necessary datafields
//
//   - Implementing the constructors
//
//   - Implementing the function "bool IsBefore(Time t)"
//     that receives one Time object t and compares if
//     the object for which the method was called happens
//     to occur before the time t.
//
//   - Implementing the member function Read()
//     that asks the user to enter all data
//     for the object and stores it in the data fields
//
//   - EXTRA CREDIT
//       write a member function "int SecondsLaterThan(Time t)"
//       that computes how many seconds the current Time object
//       is than t - the time object that was passed as a parameter

#include <iostream>
#include <string>

using namespace std;


//------------------------------------------------------------
// class declaration for class Time
//


class Time
{

  private:
    // ADD DATAFIELDS
    double hours; // store hours in 24-hour time format - to avoid problems
               // with comparing am and pm times
    double minutes;
    double seconds;
    

  public:

    //Constructors
    Time();
    Time(double h, double m, double s, string am_pm);

    //Data Access Functions

    //Task Functions
    void Read(); 
    bool IsBefore(Time t); 

};


// -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - 
// class implementation for class Time
//


// WRITE THE IMPLENTATIONS FOR ALL THE MEMBER FUNCTIONS 
// OF THE CLASS Time HERE


//Constructors

Time::Time() // Default Constructor
{
    seconds=0;
    minutes=0;
    hours=1;
}


Time::Time(double h, double m, double s, string am_pm)
{
    seconds=s;
    minutes=m;
    hours=h;
    if (am_pm == "PM" or am_pm == "pm")
        hours = hours + 12;
}


// TASK FUNCTIONS
void Time::Read()
{
    cout << "Please enter hour (1-12): " << "\n";
    cin >> hours;
    while (hours < 1 or hours > 12)
    {
       cout << "Invalid value!!! ";
       cout << "Please enter hour (1-12): " << "\n";
       cin >> hours;
    }
 
    string am_pm;

    cout << "Please enter AM or PM: " << "\n";
    cin >> am_pm;
    while (am_pm != "AM" and am_pm != "PM")
    {
       cout << "Invalid value!!! ";
       cout << "Please enter AM or PM: " << "\n";
       cin >> am_pm;
    }
 
    if (am_pm == "PM")
        hours = hours+12;

    cout << "Please enter minutes (0-59): " << "\n";
    cin >> minutes;
    while (minutes < 0 or minutes > 59)
    {
       cout << "Invalid value!!! ";
       cout << "Please enter minutes (1-12): " << "\n";
       cin >> minutes;
    }


    cout << "Please enter seconds (0-59): " << "\n";
    cin >> seconds;
    while (seconds < 0 or seconds > 59)
    {
       cout << "Invalid value!!! ";
       cout << "Please enter seconds (1-12): " << "\n";
       cin >> seconds;
    }

}


bool Time::IsBefore(Time t)
{
    // NOTE: by storing PM times as hours 13-24, no need to compare
    // am and pm - just comparing the hours is sufficient.
    if (hours < t.hours)
        return true;
    if (hours > t.hours)
        return false;
    
    if (minutes < t.minutes)
        return true;
    if (minutes > t.minutes)
        return false;

    if (seconds < t.seconds)
        return true;
    else
        return false;


}; 


//============================================================
// main program 
//


int main()
{

    Time t1(8,15,6,"PM");
    Time t2;

    t2.Read();  // let user enter the time for t2

    if (t2.IsBefore(t1)) 
    {
        cout << "You are early!\n";
    }
    else if (t1.IsBefore(t2))
    {
        cout << "You are late!\n";
    }
    else
    {
        cout << "You are just on time!\n";
    }



}