CS 115 Homework 11 (Lists, Sentinel Logic)

CS 115 Homework 11 Individual (Lists, Sentinel Logic)

65 Points

Due by Friday April 23, midnight

Submit your individual file with the Canvas link.

Educational goals of this lab - verify that every student can

create and use lists
use string methods
write sentinel logic

Preparations: Watch these videos

(45 points) Individual Problem: Payroll for ACME

Problem Description

ACME Inc. needs to calculate their payroll. Each line of input will have an employee (first) name, number of hours worked and hourly rate. There may be zero or more employees. The data for one employee will all be on one line. The data will be delimited by commas.
Your program needs to input each line of data, and calculate the paycheck for the employee.
The paycheck is just the number of hours worked times the hourly rate.
The input halts when the user presses just Enter. Remember input returns an empty string in that case.
After the data is all processed, report the total payroll (total of all paychecks).
Then print out the list of employees and their paychecks, sorted by employee name, ascending.

Sample run 1

Payroll for ACME

Press Enter to stop
Enter name, comma, hours worked, comma, hourly rate: Joe, 30, 5.50
Enter name, comma, hours worked, comma, hourly rate: Bill, 40.0,10
Enter name, comma, hours worked, comma, hourly rate: Sam,35, 12.50
Enter name, comma, hours worked, comma, hourly rate:

Total Payroll $1002.50

Employees with Paychecks
Bill     $400.00
Joe      $165.00
Sam      $437.50

By the end of the program the list would have have been: [['Bill', 400.0], ['Joe', 165.0], ['Sam', 437.50]]

Sample run 2 (no employees)

Payroll for ACME

Press Enter to stop
Enter name, comma, hours worked, comma, hourly rate:

Total payroll $0.00

(10 points) Test Cases

Calculate the paycheck amount for each employee, and the total payroll. Place at the bottom of the file as usual.

Description Employee, hours, rate Paychecks, Total Payroll

Normal case Mary, 11.50,10
Johnny,15,15.0
Carl, 20, 20
Enter ________A._________

No employees Enter _______B._______

Description	Employee, hours, rate	Paychecks, Total Payroll
Normal case	Mary, 11.50,10 Johnny,15,15.0 Carl, 20, 20 Enter	________A._________
No employees	Enter	_______B._______

(15 points) Documentation / Design

Of course give the three P's for both the main function and the other function described in the implementation below.
Document each control structure that you use.
Do NOT just repeat code in the comment; that is a waste of time for you and us.

(45 points) Implementation

You will need a split method, think about the delimiter. Use "," NOT ", ". That is, don't use a string that has a comma followed by a space. There IS a difference! You want your code to work even if the human forgets the space after the comma or puts two spaces!
Your program builds a list where each row contains [the employee name (str), the amount of their paycheck (float)]. Note: There are plenty of other ways to solve this problem. This list structure is the one that I want.
You can expect that both numbers could be floats.
You will need to start with an empty list and accumulate entries onto it. Append or concatenation will be useful here.
A bit of syntax
A bit of notation that may help. If you have a 2-dimensional list that looks like [[3,9], [4,2]] called lst, referring to lst[0] gives you a one-dimensional list [3,9]. If you want to refer to one of the elements of THAT list you can use lst[0][0] (which would be 3) or lst[0][1] (which would be 9). Subscripts are written right next to each other.
Some people like another way: they would say item = lst[0], which makes item the first element of lst, which is [3,9]. Then they use item[0] (which is 3) and item[1] (which is 9). Either way works!
You can assume the data input is correctly formatted. If a user forgets a comma, the program should crash.
Format the money amounts with 2 decimals.
(12 points) A function definition
- You must ALSO write a small function which accepts the list of raw data, coming from one line of user input, and calculates the amount of pay the employee gets. It has one parameter, the list that contains a name, hours worked, and hourly rate, ALL as strings. It returns one number, the (numeric) amount the employee gets paid. It does NOT change the list that is the parameter. This function can be literally 2 lines long. The function must have the usual 3 P's documentation. You must call the function inside the main loop where the big list is created.
Submit your finished program with the Canvas link.