To create a program that calculates the cost and change for services using if$-$statements.

Objectives

To gain proficiency with the following:

Nested if$-$statements

Multi$-$branch if$-$statements

Incremental development

Description

For this program, you should prompt the user for an automobile service and how much they paid, and then calculate how much change the user should receive. So if you imagine standing at the counter, you ask them what service they would like, and then you collect their payment. You would then check how much they paid against the cost of the service they requested. If they did not pay enough, you would tell that to the customer. If a service is requested that is not provided, this would also be said to the customer. If the service is offered and the customer paid enough, then you would let them know how much change they will receive for that service.

The list of possible services is as follows with their costs:

oil change: $ $35$

tire rotation: $ $19$

car wash: $ $7$

Things to think about is$,$ what happens if they select a service not from that list? What happens if they pay too little? What happens if they pay too much? These are all the things you should think about before ever starting to type any code.

If the user selects a service not shown in the list, you should display an appropriate error message. Also, if they don$$t pay enough, an error message should be displayed. If they pay too much, you need to give them change.

For this program, we$$ll start with the following pseudocode:

Get service type from customer

Print service type message

Get amount paid from customer

Print amount paid message

Check Service Type

If service type is oil change:

set cost to $35.$

calculate change from amount paid minus cost

if change is equal to or greater than $0$:

a$.$ print cost message

b$.$ print change from amount paid message.

else the cost is less than $0$:

a$.$ print error message for insufficient funds for oil change.

Else if service type is tire rotation:

Set cost to $19$

Repeat steps $1$ through $4$ in oil change using tire rotation cost instead.

Else if service type is car wash:

Set cost to $7$

Repeat steps $1$ through $4$ in oil change using car wash cost instead.

Otherwise service type is invalid:

Print error message for not recognized service.

Your input prompt for the auto service should be as follows:

Enter desired auto service:

with the following message printed out with service$\_$choice being the service from input:

You entered: $\{$service$\_$choice$\}$

Your input prompt for how much the user is paying should be as follows:

How much are you paying?

with the following message printed out with paid$\_$amount being the amount paid from input:

You have paid: $ $\{$paid$\_$amount$\}$

Note: Both input prompts should end with a space and a newline character.

Each cost message will be in the following format with service being the specific auto service and the service cost being that services cost:

Cost of $\{$service$\}$: $ $\{$service$\_$cost$\}$

Each change from amount paid message will be in the following format with change being the difference between the amount paid and the services cost and paid$\_$amount being the amount paid:

You are getting $ $\{$change$\}$ change back from your $ $\{$paid$\_$amount$\}$

The error message for insufficient amount paid for a service is as follows with service choice being the auto service:

Error: Your paid amount is not sufficient for the $\{$service$\_$choice$\}$ service

The error message for an invalid service request is as follows:

Error: Requested service is not recognized

Example Runs:

Enter desired auto service:

oil change

You entered: oil change

How much are you paying?

$41$

You have paid: $ $41$

Cost of oil change: $ $35$

You are getting $ $6$ change back from your $ $41$

Enter desired auto service:

tire change

You entered: tire change

How much are you paying?

$15$

You have paid: $ $15$

Error: Requested service is not recognized

Enter desired auto service:

car wash

You entered: car wash

How much are you paying?

$5$

You have paid: $ $5$

Error: Your paid amount is not sufficient for the car wash service