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/*P4Q13
 * Name:Wang Chaoran
 * Description:13 (Displaying calendars)
Write a program that prompts the user to enter the year and first day of the year,
and displays the calendar table for the year on the console. For example,
if the user entered the year 2005, and 6 for Saturday, January 1, 2005,
your program should display the calendar for each month in the year, as follows:

January 2005
Sun Mon Tue Wed Thu Fri Sat
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31

...

December 2005
Sun Mon Tue Wed Thu Fri Sat
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
*/
import java.util.Scanner;
public class P4Q13
{
  public static void main(String[] args)
  {
    Scanner scan = new Scanner(System.in);
    System.out.println("Please enter the year(eg.2005):");
    int year = scan.nextInt();
    int leapDay = 0,sum = 0,monthDay= 0;
    System.out.println("Please enter the first day of the year(eg.6 for Saturday)");
    sum = scan.nextInt();

    String dayString ="",monthString="";
    //judgement of leap year
    if(((year%4==0)&&(year%100!=0))||(year%400==0))
        leapDay=29;
             else
               leapDay=28;
        
    System.out.println("PLease enter the first day of the year(eg.6 for Saturday)");
   
   
    for(int month=1;month<=12;month++)
    {
      //Obtain the dayString
     switch(sum%7)
    {
      case 1:dayString = "    ";
      break;
      case 2:dayString = "        ";
      break;
      case 3:dayString = "            ";
      break;
      case 4:dayString = "                ";
      break;
      case 5:dayString = "                    ";
      break;
      case 6:dayString = "                        ";
      break;
      case 0:dayString = "";
    }
     //Obtain the monthString + facilitate the dayString
    switch(month)
    {
      
      case 1: sum+=31;monthDay=31;monthString="January";
      break;
      case 2: sum+=leapDay;monthDay=leapDay;monthString="February";
      break;
      case 3:sum+=31;monthDay=31;monthString="March";
      break;
      case 4:sum+=30;monthDay=30;monthString="April";
      break;
      case 5:sum+=31;monthDay=31;monthString="May";
      break;
      case 6:sum+=30;monthDay=30;monthString="June";
      break;
      case 7:sum+=31;monthDay=31;monthString="July";
      break;
      case 8:sum+=31;monthDay=31;monthString="August";
      break;
      case 9:sum+=30;monthDay=30;monthString="September";
      break;
      case 10:sum+=31;monthDay=31;monthString="October";
      break;
      case 11:sum+=30;monthDay=30;monthString="November";
      break;
      case 12:sum+=31;monthDay=31;monthString="December";
      
    }
    //Display the first two lines
    System.out.println("\n\n"+monthString+" "+year);
    System.out.println("Sun Mon Tue Wed Thu Fri Sat ");
    //Display the rest of the lines
    int count = 0;
    for(int i=1;i<=monthDay;i++)
      {
        count++;
        if(i==1)
        {
        System.out.print(dayString);
        }
        if(((sum-monthDay)%7+count)%7==0)
        System.out.printf("%-4s\n",i);
        else
        System.out.printf("%-4s",i);
       
      }
   
    }
  }
}

for(int i=0;i=sum%7;i++)

{

System.out.printf("%4s","");

}