// *************************************************************
//
//  Month.cpp
//
//  This program defines and tests a class named Month. 
//  The class has one member variable (an integer) to represent
//  the month.  It has a constructor to set the month using 
//  the first three letters in the name of the month as three
//  arguments, a constructor to set the month using an
//  integer argument (1 for January, 2 for February, and so 
//  forth), a default constructor that sets the month to 1
//  (January), an output function that outputs the month as an
//  integer, an output function that outputs the month as the
//  first three letters in the name of the month.
//
// *************************************************************

#include <iostream>
using namespace std;

//
// Definition of the Month class
//
class Month
{
public:
    Month (char firstLetter, char secondLetter, char thirdLetter);
    // Precondition: The parameters contain the first three characters
    // in the name of the month - all lowercase.
    // Postcondition: The member variable month has been set to
    // the integer value corresponding to the letters (1 for jan, 
    // (2 for feb, and so on). month is set to 0 and a message is
    // printed if the letters do not correspond to a valid month.

    Month (int monthNum);
    // Precondition: The parameter monthNum contains a valid 
    // month number (1 - 12)
    // Postcondition: The member variable month has been set to 
    // the value of the parameter monthNum.

    Month();
    // Sets the member variable month to 1 (defaults to January).

    void outputMonthNumber();
    // Postcondition: The member variable month has been output
    // to the screen if it is valid; otherwise a "not valid"
    // message is printed.

    void outputMonthLetters();
    // Postcondition: The first three letters of the name of the
    // month has been output to the screen if the month is
    // valid (1 - 12); otherwise a message indicating the month
    // is not valid is output.

private:
    int month;
};


int main ()
{
    //
    // Variable declarations
    //
    int monthNum;
    char letter1, letter2, letter3;    // first 3 letters of a month
    char testAgain;                    // y or n - loop control

    //
    // Loop to test the constructors
    //
    do {

        // 
        // Construct a default month
        //
        cout << endl;
        cout << "Testing the default constructor ..." << endl;
        Month defaultMonth;
        defaultMonth.outputMonthNumber();
        defaultMonth.outputMonthLetters();

        //
        // Construct a month using the constructor with one integer argument
        //
        cout << endl;
        cout << "Testing the constructor with one integer argument..." << endl;
        cout << "Enter a month number: ";
        cin >> monthNum;

        Month testMonth1(monthNum);
        testMonth1.outputMonthNumber();
        testMonth1.outputMonthLetters();

        //
        // Construct a month using the constructor with three letters 
        // as arguments
        //
        cout << endl;
        cout << "Testing the constructor with 3 letters as arguments ..." 
             << endl;
        cout << "Enter the first three letters of a month (lowercase): ";
        cin >> letter1 >> letter2 >> letter3;
        cout << endl;

        Month testMonth2(letter1, letter2, letter3);
        testMonth2.outputMonthNumber();
        testMonth2.outputMonthLetters();

        //
        // See if user wants to try another month
        //
        cout << endl;
        cout << "Do you want to test again? (y or n) ";
        cin >> testAgain;
    }
    while (testAgain == 'y' || testAgain == 'Y');

    return 0;
}


// default constructor
Month::Month()
{
    month = 1;
}

// --------------------------------
// ----- ENTER YOUR CODE HERE -----
// --------------------------------

// constructor
Month::Month(int monthNum)
{
	month = monthNum;
}

// constructor
Month::Month (char a, char b, char c)
{
	if (a == 'j' && b == 'a' && c == 'n')
		month = 1;
	else if (a == 'f' && b == 'e' && c == 'b')
		month = 2;
	else if (a == 'm' && b == 'a' && c == 'r')
		month = 3;
	else if (a == 'a' && b == 'p' && c == 'r')
		month = 4;
	else if (a == 'm' && b == 'a' && c == 'y')
		month = 5;
	else if (a == 'j' && b == 'u' && c == 'n')
		month = 6;
	else if (a == 'j' && b == 'u' && c == 'l')
		month = 7;
	else if (a == 'a' && b == 'u' && c == 'g')
		month = 8;
	else if (a == 's' && b == 'e' && c == 'p')
		month = 9;
	else if (a == 'o' && b == 'c' && c == 't')
		month = 10;
	else if (a == 'n' && b == 'o' && c == 'v')
		month = 11;
	else if (a == 'd' && b == 'e' && c == 'c')
		month = 12;
	else {
		month = 0;
		cout << "Input does not match a valid month." << endl;
	}
	
}

// --------------------------------
// --------- END USER CODE --------
// --------------------------------

void Month::outputMonthNumber()
{
    if (month >= 1 && month <= 12)
        cout << "Month: " << month << endl;
    else
        cout << "Error - The month is not a valid!" << endl;
}


void Month::outputMonthLetters()
{
    switch (month)
    {
      case 1:
        cout << "Jan" << endl;
        break;
      case 2:
        cout << "Feb" << endl;
        break;
      case 3:
        cout << "Mar" << endl;
        break;
      case 4:
        cout << "Apr" << endl;
        break;
      case 5:
        cout << "May" << endl;
        break;
      case 6:
        cout << "Jun" << endl;
        break;
      case 7:
        cout << "Jul" << endl;
        break;
      case 8:
        cout << "Aug" << endl;
        break;
      case 9: 
        cout << "Sep" << endl;
        break;
      case 10:
        cout << "Oct" << endl;
        break;
      case 11:
        cout << "Nov" << endl;
        break;
      case 12:
        cout << "Dec" << endl;
        break;
      default:
        cout << "Error - the month is not a valid!" << endl;
    }
}

/* Description
For this problem write part of the class - the three constructors and the two output functions. 
Embed the class definition in a test program.
*/

/* Output:


Testing the default constructor ...
Month: 1
Jan

Testing the constructor with one integer argument...
Enter a month number: 3
Month: 3
Mar

Testing the constructor with 3 letters as arguments ...
Enter the first three letters of a month (lowercase): mar

Month: 3
Mar

Do you want to test again? (y or n) y

Testing the default constructor ...
Month: 1
Jan

Testing the constructor with one integer argument...
Enter a month number: 20
Error - The month is not a valid!
Error - the month is not a valid!

Testing the constructor with 3 letters as arguments ...
Enter the first three letters of a month (lowercase): xxx

Input does not match a valid month.
Error - The month is not a valid!
Error - the month is not a valid!

Do you want to test again? (y or n)

*/