/* FC.java - convert between Fahrenheit and Celcius.
 * First, give the user a choice.  Which way do you want to go?
 * Then, we handle the 2 scenarios.  Ask the user for a temperature,
 *   and then convert it to the other scale.
 * Note that we need to use a scanner in both cases, so let's open
 * the scanner at the beginning of the program.
 */
import java.util.Scanner;

public class FC
{
  public static void main(String [] args)
  {
    Scanner sc = new Scanner(System.in);

    System.out.printf("Temperature conversion program.\nMENU...\n");
    System.out.printf("(1) Fahrenheit to Celcius\n");
    System.out.printf("(2) Celcius to Fahrenheit\n");
    System.out.printf("Please enter the number of your choice:  ");
    int choice = sc.nextInt();

    // Do the appropriate conversion.
    // When you multiply, don't forget the * sign!
    // Also note that variables that we declare are only alive in
    //   the block in which they are declared.
    if (choice == 1)
    {
      System.out.printf("Enter Fahrenheit temperature:  ");
      double fahrenheit = sc.nextDouble();
      double celcius = 5.0/9.0 * (fahrenheit - 32.0);
      System.out.printf("Equivalent Celcius is %.1f\n", celcius);
    }
    else
    {
      System.out.printf("Enter Celcius temperature:  ");
      double celcius = sc.nextDouble();
      double fahrenheit = 9.0/5.0 * celcius + 32.0;
      System.out.printf("Equivalent Fahrenheit is %.1f\n", fahrenheit);
    }    
  }
}