Programming Challenge 4.10 - Days In Month Leap Year

/* Days In Month Leap Year - This program asks the user to enter the month (letting
   the user enter an integer in the range of 1 through 12) and a year. The program
   displays the number of days in that month.

   It also identifies and displays that a year is a leap year and displays it. The
   following applies to determine whether a year is a leap year or not:

   * Determine whether the year is divisible by 100. If it is, then it is a leap
     year, if and only if it is divisible by 400. (Ex: 2000 is a leap year, 2001
     is not)
   * If the year is not divisible by 100, then it is a leap year if and only if it
     is divisible by 4. (Ex: 2008 is a leap year, 2009 is not) */

#include "Utility.h"

int main()
{
    /* Constants for days in month */
    const int THIRTY_DAYS = 30;
    const int THIRTYONE_DAYS = 31;
    const int TWENTYEIGHT_DAYS = 28;
    const int TWENTYNINE_DAYS = 29;

    /* Hold months and year */
    int month,
        year;

    /* Hold boolean leapYear*/
    bool leapYear = 0;

    /* Hold month name and date short (1st, 2nd ... 12th) */
    string mName = " ";
    string dShort = " ";

    /* Ask the user for a month and a year */
    cout << "Enter month: ";
    cin >> month;
    cout << "Enter a year (2000): ";
    cin >> year;

    switch (month)
    {
    case 1: mName = "January";
        break;
    case 2: mName = "February";
        break;
    case 3: mName = "March";
        break;
    case 4: mName = "April";
        break;
    case 5: mName = "May";
        break;
    case 6: mName = "June";
        break;
    case 7: mName = "July";
        break;
    case 8: mName = "August";
        break;
    case 9: mName = "September";
        break;
    case 10: mName = "October";
        break;
    case 11: mName = "November";
        break;
    case 12: mName = "December";
        break;
    }

    /* Determine dShort */
    if (month == 4 || month == 5 || month == 6 || month == 7 || month == 8 ||
        month == 9 || month == 10 || month == 11 || month == 12)
    {
        dShort = "th";
    }
    else if (month == 1)
    {
        dShort = "st";
    }
    else if (month == 2)
    {
        dShort = "nd";
    }
    else
    {
        dShort = "rd";
    }

    /* Determine whether a year is a leap year or not and display
       either year or leap year */
    if (year % 100 == 0 || year % 400 == 0 || (year % 4) == 0)
    {
        leapYear = 1;
        cout << "The year is: " << year << " which is a leap year.\n";
    }
    else
    {
        leapYear = 0;
        cout << "The year is: " << year << endl;
    }

    /* Determine if month has 28, 30 or 31 days */

    if (month != 2)
    {
        (month == 1 || month == 3 || month == 3 || month == 5 ||
            month == 7 || month == 8 || month == 10 || month == 12) ?
            cout << "The " << month << dShort << ". month is "
            << mName << " which has: " << THIRTYONE_DAYS << " days\n" :
            cout << "The " << month << dShort << ". month is "
            << mName << " which has: " << THIRTY_DAYS << " days\n";
    }
    else
    {
        (month == 2 && leapYear != 0) ?
            cout << "The " << month << dShort << ". month is "
            << mName << " which has " << TWENTYNINE_DAYS << " days\n" :
            cout << "The " << month << dShort << ". month is "
            << mName << " which has " << TWENTYEIGHT_DAYS << " days\n";
    }

    pauseSystem();
    return 0;
}