[ZimbuTM]

Hi guys, it's my first semester of computer science and I'm having a bit of trouble with the second assignment.

Basically, it's supposed to be a program that asks users to input a date (year month day). First, it's supposed to print a proper date (January 1, 2005), then it's supposed to give out the day number (January 1, 2005 = Day 1 of the year) and finally it's supposed to print the NEXT date (January 2, 2005).

I don't want the solution to this, just a nudge in the right direction. Thanks.

EDIT: Is it better if I associate the month days with constants? (final int JANUARY = 31)?

//********************************************************************************
//AUTHOR: RM
//Purpose: 1.   Convert year/month/day into proper date (April 30, 2005)
//.        2.   Display the day number. (April 30th, 2005 = Day 120 in the year)
//         3.   Display the NEXT date of inputted date (May 1, 2005)
//Last modified: September 17th, 2005
//********************************************************************************

import java.util.*;

public class Date
{

	//Initate scanner
	static Scanner keyboard = new Scanner(System.in);

	public static void main(String[] args)
	{

		//Variable declaration
		int year;
		int month;
		int dayOfMonth;
		int numOfDays;
		int dayNumber
		String monthName = "";

		//Prompt user for input
		System.out.print("Please enter a date (year month day): ");
		year       = keyboard.nextInt();
		month      = keyboard.nextInt();
		dayOfMonth = keyboard.nextInt();



	//Exclude invalid entries (will give more information to user than just using Switch default cases)

	if (dayOfMonth > 31 || dayOfMonth < 1 || month > 12 || month < 1 || year < 1583)
	{

		System.out.println("\nPlease enter a valid date. Invalid date entries include:\n");
		System.out.println("1. Days larger than 31 OR Days lower than 1");
		System.out.println("2. Months larger than 12 OR Months lower than 1");
		System.out.println("3. Years below 1583\n");
		System.exit(0);
	}

	if (dayOfMonth > 30 && (month == 4 || month == 6 || month == 9 || month == 12))
	{
		System.out.println("\nThe months of April, June, September and November cannot have more than 30 days.");
		System.out.println("Please re-run the program\n");
		System.exit(0);
	}

	if (dayOfMonth > 29 && month == 2)
	{
		System.out.println("\nThe month of February cannot have more than 29 days.");
		System.out.println("Please re-run the program\n");
		System.exit(0);
	}



		//FIRST switch statement (Store number of days of months in variable)
		switch (month)
		{
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:
				numOfDays = 31; break;
			case 4:
			case 6:
			case 9:
			case 11:
				numOfDays = 30; break;
			case 2:
				if ( (year % 400 == 0) || ((year % 4 == 0) && !(year % 100 == 0)) )
					numOfDays = 29;
				else
					numOfDays = 28; break;
			default: break;
		}

		//SECOND switch statement (store month name in String variable)
		switch (month)
		{
            case 1:  monthName = "January"; break;
            case 2:  monthName = "February"; break;
            case 3:  monthName = "March"; break;
            case 4:  monthName = "April"; break;
            case 5:  monthName = "May"; break;
            case 6:  monthName = "June"; break;
            case 7:  monthName = "July"; break;
            case 8:  monthName = "August"; break;
            case 9:  monthName = "September"; break;
            case 10: monthName = "October"; break;
            case 11: monthName = "November"; break;
            case 12: monthName = "December"; break;
            default: break;
		}

		//Calculate day number
		



















	}

}