import java.util.*;
public class month {
public static void main(String[] args) {
int month;//Define the number entered by the user
Scanner scanner=new Scanner(System.in);
boolean flag=true;//Define the flag if the user chooses to exit, Then flag=false
while(flag){
System.out.print("Please enter an integer data between (1--12) (enter 0 to end) ：");//Print prompt information
month=scanner.nextInt();//Accept keyboard input
switch(month){
case 0:System.out.println("You have exited");flag=false;break;
case 1:System.out.println("January 31 days");break;
case 2:System.out.println("February 28 or 29 days");break;
case 3:System.out.println("March 31 days"); break;
case 4:System.out.println("30 days in April");break;
case 5:System.out.println("31 days in May" );break;
case 6:System.out.println("30 days in June");break;
case 7:System.out.println("July 31 day");break;
case 8:System.out.println("August 31st");break;
case 9:System.out.println("九 30 days in October");break;
case 10:System.out.println("31 days in October");break;
case 11:System.out.println( "November 30 days");break;
case 12:System.out.println("December 31 days");break;
default:System.out .println("Input error, please re-enter");
}
}
}
}