/*
 * This program does temperature conversions.
 * It can convert from Fahrenheit to Celsius or from Celsius
 * to Fahrenheit, at the user's preference.
 */

import tio.*;

class Convert {
    public static void main(String[] args) {
	double fahrenheit = 0.0, celsius = 0.0;
	boolean keepGoing = true;
	char conversion;
	
	// Keep doing conversions until the user says to stop
	while(keepGoing == true) {
	    
	    // Ask the user which conversion to perform
	    System.out.print("\nPlease enter\tF for Fahrenheit to Celsius" 
                             + " conversion or\n\t\tC for Celsius to "
			       + "Fahrenheit conversion: ");    
	    conversion = (char)Console.in.readChar();
	    Console.in.readChar(); // Clean up the extra newline

	    // Perform the conversion, depending upon what the user entered
	    if(conversion == 'F' || conversion == 'f') {
		// Perform the F to C conversion

		// Get the Fahrenheit temperature
		System.out.println("");
		System.out.print("Please enter the Fahrenheit temperature: ");
		fahrenheit = Console.in.readDouble();
		Console.in.readChar(); // Clean up the extra newline

		// Convert it to Celsius
		celsius = (5.0/9.0) * (fahrenheit - 32);

		// Print out the result
		System.out.println(fahrenheit + " Fahrenheit = " 
                                 + celsius + " Celsius"); 
	    } else {
		// Perform the C to F conversion

		// Get the Celsius temperature
		System.out.println("");
		System.out.print("Please enter the Celsius temperature: ");
		celsius = Console.in.readDouble();
		Console.in.readChar(); // Clean up the extra newline

		// Convert it to Fahrenheit
		fahrenheit = ((9.0/5.0) * celsius) + 32;

		// Print out the result
		System.out.println(celsius + "Celsius = " 
                                   + fahrenheit + " Fahrenheit");
	    }

	    // See if we should do another conversion
	    System.out.println("");
	    System.out.print("Would you like to do another conversion (y/n)?");
	    keepGoing = ((char)Console.in.readChar() == 'y');
	    Console.in.readChar(); // Clean up the extra newline
	}
    }
}