Assignemnt #96

Code

///colin hinton
///5th period
///WeekdayCalc.java
///1/6/2015

import java.util.Scanner;

public class WeekdayCalc
{
	public static void main( String[] args )
	{
		Scanner keyboard = new Scanner(System.in);

		System.out.println("Welcome to Mr. Davis's fantastic birth-o-meter!");
		System.out.println();
		System.out.println("All you have to do is enter your birth date, and it will");
		System.out.println("tell you the day of the week on which you were born.");
		System.out.println();
		System.out.println("Some automatic tests....");
		System.out.println("12 10 2003 => " + weekday(12,10,2003));
		System.out.println(" 2 13 1976 => " + weekday(2,13,1976));
		System.out.println(" 2 13 1977 => " + weekday(2,13,1977));
		System.out.println(" 7  2 1974 => " + weekday(7,2,1974));
		System.out.println(" 1 15 2003 => " + weekday(1,15,2003));
		System.out.println("10 13 2000 => " + weekday(10,13,2000));
		System.out.println();

		System.out.println("Now it's your turn!  What's your birthday?");
		System.out.print("Birth date (mm dd yyyy): ");
		int mm = keyboard.nextInt();
		int dd = keyboard.nextInt();
		int yyyy = keyboard.nextInt();

		
		System.out.println("You were born on " + weekday(mm,dd,yyyy));
	}


	public static String weekday( int mm, int dd, int yyyy )
	{
		int yy, total;
		String date = "";
        yy = yyyy - 1900;
        total = (yy / 4) + yy + dd;
        total = monthOffset(mm) + total;
        boolean leapyear = isLeap(yyyy);
        if (leapyear == true )
        {
           if (mm == 1 || mm == 2 ) 
            total = total - 1;
            
        }
        
        int weekday = total%7;
        weekday_name(weekday);
		

		date = weekday_name(weekday) + " " + monthName(mm) + " " + dd + ", " + yyyy;

		return date;
	}


	
    public static String monthName( int mm)
    {
            String ans;
            if ( mm == 1 )
                ans = "January";
            else if ( mm == 2 )
                ans = "February";
            else if ( mm == 3 )
                ans = "March";
            else if ( mm == 4 )
                ans = "April";
            else if ( mm == 5 )
                ans = "May";
            else if ( mm == 6 )
                ans = "June";
            else if ( mm == 7 )
                ans = "July";
            else if ( mm == 8 )
                ans = "August";
            else if ( mm == 9 )
                ans = "September";
            else if ( mm == 10 )
                ans = "October";
            else if ( mm == 11 )
                ans = "November";
            else if ( mm == 12 )
                ans = "December";
            else 
                ans = "Error";
    		
    		return ans;
    }
    public static int monthOffset( int mm )
	{
		int result;
		if (mm == 1)
            result = 1;
        else if (mm == 2)
            result = 4;
        else if (mm == 3)
            result = 4;
        else if (mm == 4)
            result = 0;
        else if (mm == 5)
            result = 2;
        else if (mm == 6)
            result = 5;
        else if (mm == 7)
            result = 0; 
        else if (mm == 8)
            result = 3;
        else if (mm == 9)
            result = 6;
        else if (mm == 10)
            result = 1;
        else if (mm == 11)
            result = 4;
        else if (mm == 12)
            result = 6;
        else 
            result = -1;
		return result;
	}
    public static String weekday_name( int weekday )
	{
		String result = "";

		if ( weekday == 1 )
		{
			result = "Sunday";
		}
		else if ( weekday == 2 )
		{
			result = "Monday";
		}
        else if(weekday == 3)
        {
            result = "Tuesday";
        }
        else if(weekday == 4)
        {
            result = "Wednseday";
        }
        else if(weekday == 5)
        {
            result = "Thursday";
        }
        else if(weekday == 6)
        {
            result = "Friday";
        }
        else if(weekday == 7)
        {
            result = "Saturday";
        }
		else if(weekday == 0)
        {
            result = "Saturday";
        }
        else 
        {
            result = "error";
        }
		return result;
        
	}
		
	public static boolean isLeap( int yyyy )
	{
		boolean result;

		if ( yyyy%400 == 0 )
        {
			result = true;
        }
		else if ( yyyy%100 == 0 )
        {
			result = false;
        }
		else if ( yyyy%4 == 0 )
        {
			result = true;
         }
		else
        {
			result = false;
        }
		
		return result;
	}
}
    

Picture of the output