class TempConverter2 {

  static double fahrToCelc( double tempF ) {
    return (tempF - FAHR_FREEZING) * CELC_PER_FAHR;
  }

  static double FAHR_FREEZING =  32.0;
  static double FAHR_BOILING  = 212.0;
  static double CELC_PER_FAHR = 100.0 / (FAHR_BOILING - FAHR_FREEZING);


  static void testInteractive() {
    java.util.Scanner s;         // Declare a variable.

   /* make a new Scanner which reads from the keyboard (System.in): */
    s = new java.util.Scanner( System.in );

    System.out.print( "What is your name? " );
    String usersName;
    usersName = s.next();

    double temperature;

    System.out.print( "Please enter a temperature in Fahrenheit: " );
    temperature = s.nextDouble();
    System.out.println( "Hi " + usersName + "; " 
                      + temperature + "F = " + fahrToCelc(temperature) +  "C." );

    System.out.print( "Please enter a temperature in Fahrenheit: " );
    temperature = s.nextDouble();
    System.out.println( "Hi " + usersName + "; " 
                      + temperature + "F = " + fahrToCelc(temperature) +  "C." );

    System.out.print( "Please enter a temperature in Fahrenheit: " );
    temperature = s.nextDouble();
    System.out.println( "Hi " + usersName + "; " 
                      + temperature + "F = " + fahrToCelc(temperature) +  "C." );
     
    System.out.println( "Have you ever noticed, " + usersName + ",\n"
                      + "that everybody complains about the weather,\n"
                      + "but nobody does anything about it?" );
                      // Quote by Mark Twain.

    // Note: No return value, from this function --
    // printing results to the console means they're gone forever,
    // and we can't pass those strings to other methods for further
    // processing; we'd need to *return* the string for that.
  }



  static void testTempConverter2() {
    System.out.println( "Actual: " + fahrToCelc(32) );
    System.out.println( "Expect: " + 0.0 );
    System.out.println( "Actual: " + fahrToCelc(212) );
    System.out.println( "Expect: " + 100.0 );
    System.out.println( "Actual: " + fahrToCelc(-40) );
    System.out.println( "Expect: " + -40.0 );
    System.out.println( "Actual: " + fahrToCelc(98.6) );
    System.out.println( "Expect: " + 37.0 );
  }
}