8, (Conversion program) Write a program that asks the user to enter a distance i

Question

8, (Conversion program) Write a program that asks the user to enter a distance in meters. The program will the present the following menu of selections:

1. Convert to kilometers

2. Convert to inches

3. Convert to feet

4. Convert to program

The program will convert the distance to kilometers,inches,or feet,depending on the user's election.Here are the specific requirements:

    Write a void method named showKilometers,which accepts the number of meters as an argument. The method should display the argument converted to kilometers. Convert the meter to kilometers using the following formula:

kilometers = meters * 0.001

    Write a void method named showInches, which accepts the number of meters as an argument. The method should display the argument converted to inches. Convert the meters to inches using the following formula:

inches = meters * 39.37

    Write a void method named showFeet, which accepts the number of meters as an argument. The method should display the argument converted to feet. Convert the meters to feet using the following formula:

feet = meters * 3.281

    Write a void named menu that displays the menu of selections. This method should not accept any arguments.

    The program should continue to display the menu until the user enters to quit the program.

    The program should not accept negative numbers for the distance in meters.

    If the user selects an invalid choice from the menu, the program should display an error message.

Here is an example session with the program, using console input. The user's input is shown in bold .

     Enter a distance in meters: 500[Enter]

     1. Convert to kilometers

     2. Convert to inches

     3. Convert to feet

     4. Quit the program

     Enter your choice: 1[Enter]

     500 meters is 0.5 kilometers.

     1. Convert to kilometers

     2. Convert to inches

     3. Convert to feet

     4. Quit the program

     Enter your choice: 3[Enter]

     500 meters is 1640. feet.

     1. Convert to kilometers.

     2. Convert to inches.

     3. Convert to feet.

     4. Quit the program.

     Enter your choice: 4[Enter]

     Bye !

Explanation / Answer

import java.util.Scanner;

public class conversionProgram

{
public static void showKilometers(double meters) //this is a parameterized function
{
double kilometers = meters * 0.001;
System.out.println(meters +" meters is " + kilometers + " kilometers.");
}

public static void showInches(double meters)
{
double inches = meters * 39.37;
System.out.println(meters +" meters is " + inches + " inches.");
}

public static void showFeet(double meters)
{
double feet = meters * 3.281;
System.out.println(meters +" meters is " + feet + " feet.");
}

public static void quitProgram()
{
System.out.println("Goodbye!");
System.out.println(0);
}
public static void showMenu()
{
System.out.println(" 1. Convert to kilometers ");
System.out.println(" 2. Convert to inches ");
System.out.println(" 3. Convert to feet ");
System.out.println(" 4. Quit the program ");
System.out.println(" ");
}

public static void main (String [] args)
{

double meters;
int choice;



Scanner keyboard = new Scanner (System.in);

System.out.println("Enter a distance in meters: ");
meters = keyboard.nextDouble();
showMenu();
choice = keyboard.nextInt();
switch(choice) //note the use of switch case
{
case 1: showKilometers(meters);
break;
case 2:showInches(meters);
break;
case 3:showFeet(meters);
break;
case 4:
quitProgram();
}
}
}

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