Question

This is a Java program

Program Description

You work for a local cell phone company and have been asked to write a program to calculate the price of a cell phone data plan being purchased by a customer.

The program should do the following tasks:

• Display a menu of the data plans that are available to be purchased.
• Read in the user’s selection from the menu.  Input Validation: If the user enters an invalid option, the program should display an error message and ask them to re-enter their selection.
• Ask the user to enter the number of phone lines on the plan. Input Validation: If the user enters a number of 0 or less, the program should display an error message and ask them to re-enter the number.
• Output the cost of the cell phone plan.
• Ask the user whether he/she wants to run the program again. If so, the steps above are repeated. If not, the program should terminate.

The program should include the following methods:

1. A method that displays a data plan menu. This method should accept no arguments and should not return a value. See the Sample Input and Output for how to format the menu.
2. A method that accepts one argument: the menu selection that indicates which data plan was selected. The method should return the base price using the information in the table below:

Data Plan Size	Base Price
1 GB	$34.99
2 GB	$49.99
4 GB	$64.99
Unlimited	$74.99 Unlimited plans include two (2) free lines

3. A method that calculates the cost of a cell phone plan. This method should accept two arguments: the number of phone lines and the base price of the plan. The method should return the cost of the cell phone plan. The cost of the cell phone plan can be calculated as follows:

Cell Phone Plan Cost = BASE PRICE + (10.00 * NUMBER OF PHONE LINES)

Note: Unlimited plans include two (2) free lines. For example, an unlimited plan with 6 phone lines would have its cost calculated as follows:

Cell Phone Plan Cost = $74.99 + ($10.00 * (6-2)) = $114.99

4. A method that displays the final cost. The method should accept one argument: the final cost.

All methods should be coded as instructed above. Modifying the methods (adding or removing parameters, changing return type, etc…) will count as a major error (i.e., one major error deduction for each method that is modified.)

You should call the methods you created above from the main method.

The output of the program (including spacing and formatting) should match the Sample Input and Output shown below.

Sample Input and Output (include spacing as shown below). Do not modify the input and output statements.

Data Plan Menu:

1. 1 GB
2. 2 GB
3. 4 GB
4. Unlimited

Select a plan from the menu above: 4
Enter the number of phones: 5
The total price of the cell phone plan (before tax and fees) is: $104.99

Do you wish to calculate the price of another plan (Y/N)?Y

Data Plan Menu:

1. 1 GB
2. 2 GB
3. 4 GB
4. Unlimited

Select a plan from the menu above: 2
Enter the number of phones: 1
The total price of the cell phone plan (before tax and fees) is: $59.99

Do you wish to calculate the price of another plan (Y/N)?N

Answer 1

Code

import java.util.Scanner;

public class Main {
static Scanner sc=new Scanner(System.in);
public static void main(String[] args) {
char again;
int selectedPlan;
double cost;
do
{
menu();
do
{
System.out.print("Select a plan from the menu above:");
selectedPlan=sc.nextInt();
if(selectedPlan<0 || selectedPlan>4)
System.out.println("Please etner valid plan.");
}while(selectedPlan<0 || selectedPlan>4);
cost=calculateCost(selectedPlan);
System.out.println("The total price of the cell phone plan (before tax and fees) is: $"+cost);
System.out.print("Do you wish to calculate the price of another plan (Y/N)?");
again=sc.next().charAt(0);
}while(again=='Y'||again=='y');
}

public static void menu() {
System.out.println("Data Plan Menu:\n1. 1 GB\n" +
"2. 2 GB\n" +
"3. 4 GB\n" +
"4. Unlimited");
}

private static double calculateCost(int plan)
{
int numLines;
do
{
System.out.print("Enter the number of phones:");
numLines=sc.nextInt();
if(numLines<0)
System.out.println("Please enter valid input.");
}while(numLines<0);
double totalCost=0;
switch(plan)
{
case 1:
totalCost=34.99+(10*numLines);
break;
case 2:
totalCost=49.99+(10*numLines);
break;
case 3:
totalCost=64.99+(10*numLines);
break;
case 4:
if(numLines>2)
totalCost=74.99+(10*(numLines-2));
else
totalCost=74.99;
break;
}
return totalCost;
}
  
}

output

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