methods6.java

import java.util.Scanner;
public class number6 {
    public static void main(String[] args) {

        /*6. Implement the following integer methods:
        *(a) Method Celsius returns the Celsius equivalent of a Fahrenheit temperature, using
        * Celsius = 5.0 / 9.0 * (Fahrenheit – 32);
        *(b) Method Fahrenheit returns the Fahrenheit equivalent of a Celsius temperature, using the calculation
        * Fahrenheit = 9.0 / 5.0 * Celsius + 32;
        *(c) Use the methods from parts (a) and (b) to write an application that enables the user either to enter a
        * Fahrenheit temperature and display the Celsius equivalent or to enter a Celsius temperature
        * and display the Fahrenheit equivalent.
         */

        Scanner input = new Scanner (System.in);

        double celsius, fahrenheit;
        String desired_temp;

        System.out.println("Celsius or Fahrenheit?");
        desired_temp = input.next();

        if(desired_temp.equals("celsius")) {
            System.out.println("What is the temperature?");
            celsius = input.nextDouble();

            System.out.println("Temperature: " +celsius + "C");
            System.out.println("Fahrenheit equivalent: " +Fahrenheit(celsius) + "F");
        }
        else
            if(desired_temp.equals("fahrenheit")) {
                System.out.println("What is the temperature?");
                fahrenheit = input.nextDouble();

                System.out.println("Temperature: " +fahrenheit + "F");
                System.out.println("Celsius equivalent: " +Celsius(fahrenheit) + "C");
            }
    }

    public static double Celsius (double fahrenheit) {
        double celsius;

        celsius = 5.0 / 9.0 * (fahrenheit - 32);

        return celsius;
    }

    public static double Fahrenheit (double celsius) {
        double fahrenheit;

        fahrenheit = 9.0 / 5.0 * (celsius + 32);

        return fahrenheit;
    }
}