import java.util.Scanner;

public class IOStuff
{
  public static int getInt()
  {
    int retval;
    Scanner kb = new Scanner(System.in);

    System.out.println("Enter an integer:");
    retval = kb.nextInt();
    return retval;
  }

  public static double getDouble(String s)
  {
    double retval;
    Scanner kb = new Scanner(System.in);
    
    System.out.println(s);
    retval  = kb.nextDouble();
    return retval;
  }

  public static double getDouble(String prompt, double minVal, double maxVal)
  {
    double retval;
    Scanner kb = new Scanner(System.in);
    
    System.out.println(prompt);
    retval = kb.nextDouble();
    while ( retval < minVal || retval > maxVal )
    {
      System.out.println("I am sorry.  " + retval + " is not between " + minVal + " and " + maxVal);
      System.out.println(prompt);
      retval = kb.nextDouble();
    }
    return retval;
  }


  public static double getDouble()
  {
    double retval;
    Scanner kb = new Scanner(System.in);
    
    System.out.println("Enter a double:");
    retval = kb.nextDouble();
    return retval;
  }

  public static void main(String args[])
  {
    int x, y;
    x = 10;
    y = 20;
    tryit(x, y);
    System.out.println("x = " + x + " y = " + y);

  }

}