package untitled4;
import java.io.*;
import java.util.*;
                 
public class SavitchIn
{

    public static String readLine()
    {
        char nextChar;
        String result = "";
        boolean done = false;
        while (!done)
        {
            nextChar = readChar();
            if (nextChar == '\n')
                done = true;
            else if (nextChar == '\r')
            {
             
            }
            else
                result = result + nextChar;
         
        }
        return result;
    }    
        
    public static char readChar()
    {
        int charAsInt = -1;
        try
        {
            charAsInt = System.in.read();
        }
        catch (IOException e)
        {
            System.out.println(e.getMessage());
            System.out.println("Fatal error.Ending Program");
            System.exit(0);
        }
        return(char)charAsInt;
    }
    public static int readLineInt()
    {
        String inputString = null;
        int number = -9999;
        boolean done = false;
        while(!done)
        {
            try
            {
                inputString = readLine();
                inputString = inputString.trim();
                number = Integer.parseInt(inputString);
                done = true;
                
            }
            
            catch (NumberFormatException e)
            {
                System.out.println("Your input number is not correct.");
                System.out.println("Your input number must be");
                System.out.println("a whole number written as an");
                System.out.println("ordinary numeral, such as 42");
                System.out.println("Minus signs are ok,"+"but don't use a plus.");
                System.out.println("Please try again.");
                System.out.println("Enter a whole number:");
            }
        }
          return number;
  
   }       
    
   public static double readLineDouble()
   {
       String inputString = null;
       double number = -9999;
       boolean done = false;
       
       while(!done)
       {
           try
           {
               inputString = readLine();
               inputString = inputString.trim();
               number = Double.parseDouble(inputString);
               done = true;
           }
           catch (NumberFormatException e)
           {
                System.out.println("Your input number is no correct.");
                System.out.println("Your input number must be");
                System.out.println("a whole number written as an");
                System.out.println("ordinary number either with");
                System.out.println("or without a decimal point,");
                System.out.println("such as 42 or 9.99");
                System.out.println("Please try again.");
                System.out.println("Enter a whole number:");
           }
       }
         return number;
   }
   public static char readNonwhiteChar()
   {
       char next;
       next = readChar();
       while(Character.isWhitespace(next))
           next =readChar();
       return next;
   }
}