//Cat.java -- simple Java Application, by tsaiwn@csie.nctu.edu.tw
import java.util.*;
class Cat {
    public static void main(String xxx[ ]) {
       System.out.println("Now is " + new Date( ) );
       Cat a = new Cat( );
       while(true) {
          a.printf("give me a double: ");
          double x = getDDD( );
          printf("Sqrt of " + x + "=" + java.lang.Math.sqrt(x));
       }//while(
    }// main
  static void printf(String s) {
     System.out.print(s);
  }
  static double getDDD( ) {
      Scanner a = new Scanner(System.in);
      return a.nextDouble( );
  }
}// class Cat