package temperature;

import java.util.Scanner;

/**
* An application which will convert from Fahrenheit to Celsius or from Celsius
* to Fahrenheit.
*/
public class Converter {

/**
* The entry point of the application.
* @param args No arguments expected.
*/
public static void main(String[] args)
{
int choice;
int temp1;
int temp2;
String from;
String to;
Scanner kb = new Scanner(System.in);
do {
choice = -1;
System.out.println("\nConvert temperature:\n");
System.out.println("\t1 - Convert from Fahrenheit to Celsius");
System.out.println("\t2 - Convert from Celsius to Fahrenheit");
System.out.println("\t3 - Exit");
choice = kb.nextInt();

switch (choice) {
case 1:
System.out.println("\nEnter the temperature in Fahrenheit:");
temp1 = kb.nextInt();
temp2 = convertToCelsius(temp1);
from = "Fahrenheit";
to = "Celsius";
break;
case 2:
System.out.println("\nEnter the temperature in Celsius:");
temp1 = kb.nextInt();
temp2 = convertToFahrenheit(temp1);
from = "Celsius";
to = "Fahrenheit";
break;
default:
continue; // no input, no output
}
System.out.print("\n");
System.out.print(temp1);
System.out.print(' ');
System.out.print(from);
System.out.print(" = ");
System.out.print(temp2);
System.out.print(' ');
System.out.print(to);
System.out.print('\n');
} while (choice != 3);
}

/**
* Converts from Fahrenheit to Celsius
* @param temp The temperature in Fahrenheit
* @return The temperature in Celsius
*/
private static int convertToCelsius(int temp) {
return (temp - 32) / 9 * 5;
}

/**
* Converts from Celsius to Fahrenheit
* @param temp The temperature in Celsius
* @return The temperature in Fahrenheit
*/
private static int convertToFahrenheit(int temp) {
return (9 * temp) / 5 + 32;
}
}