import java.util.Scanner; // For user input

/**
* Compute wind chill given temp. in Fahrenheit and wind speed in miles per hour
* Ref.: J. Adams et al., C++: An Intro. to Computing
*
* @author (Michael Branicky)  09/07/2006, modified 09/05/2007
*/
public class WindChill
{
   public static void main(String args[])
   {
      // Declaration of variables to be used
      double windSpeed, tempFahr, vPart, windChill;

      // Create Scanner to obtain input from command window
      Scanner input = new Scanner( System.in );

      // Get user input
      System.out.print("Enter temp. (F): ");
      tempFahr = input.nextDouble();
      System.out.print("Enter wind speed (mph): ");
      windSpeed = input.nextDouble();

     // compute v_part
     vPart = 0.474677 - 0.020425 * windSpeed + 0.303107 * Math.sqrt(windSpeed);

     // compute wind chill
     windChill = 91.4 - vPart * (91.4 - tempFahr);

     // Display output
     System.out.println("Wind Chill index = " + windChill);
   }
}