How to Get Started
mkdir ~/ScriptingProj
cp ~/../public/ScriptingProj/GenerateStatement.sh.empty ~/ScriptingProj cp ~/../public/ScriptingProj/list ~/ScriptingProj cd ~/ScriptingProj
mv GenerateStatement.sh.empty GenerateStatement.sh chmod 775 GenerateStatement.sh list

Assignment Overview
At the end of the quarter, our imaginary rival school (!) University of Southern San Diego is inviting us to a huge coding competition, and our own Reimbursement Office has asked you to provide an reimbursement statement that covers the food order for our competing teams. This Statement includes the guest list of who is attending, the cost per person, the required budget, and several more information. You, after learning shell scripting in CSE 15L, decide that this is a great opportunity to create a practical script where you can generate statements on the fly.

The script will take a text file containing a list of competitor names as argument. In addition, you may pass in two option flags to configure how the script behaves:

1. Send output to a file (-o): If the user runs your script with the ‘-o’ flag, your script will send the standard output of the statement into a file. If the flag is not present, then the output will be printed to the terminal.
2. Customizing tip (-t): If the user runs your script with the ‘-t’ flag, your script will allow you to set a custom amount of tip that will be subtracted off from the total budget. If the flag is not present, then the tip rate will be set to a default of 20%.
Part 1:
Your task for Part 1 is to write the following functions:
1. function usage { .. }
The purpose of the function `usage` is to check whether or not that the script is used correctly.

The correct usage should be:

./GenerateStatement [-o outputfile ] [-t tipamount ] guestlist

Your script should detect an illegal usage of your script’s options on the command line. For example, if a user typed:

$ ./GenerateStatement -o
$ ./GenerateStatement -o output -p

Your script should print out an error message explaining the appropriate usage of your script.

Additionally, the `usage` function will check whether or not the flags have an invalid, or missing arguments, in which case you must display the `$USAGE`, and `exit 1`.

In order to write this functionality, you will need to use the `getopts` functionality. Using if-statements will not be sufficient, and you will be docked.

2. function parse_guests { .. }
The purpose of the function `parse_guests` is to take the ‘guestlist’ input, and store it into the $GUEST array.

The ‘guestlist’ file will always have each name separated by a new line. For example:
Charly
Alex
Eric
Lucy
Priyanka

To help you with this function, you can use the `read` and `while` commands to input each name into $GUEST.
3. function print_guest { .. }
The purpose of the function `print_guest_list` is print out all the elements inside the $GUEST array.

The output for this function, using the example given in `parse_guest_list` should look like the following:

Charly
Alex
Eric
Lucy
Priyanka

Part 2:
For the second part, you will need to be able to calculate all the costs (including with the -t option flag), and produce a statement either to the terminal or a file with the ‘-o’ option flag.

Keep in mind, Part one has provided you with helper functions that can make this portion a lot simpler.

function calc { .. }
The purpose of this function is to perform all of the budget calculations. You can use any method of calculating, but we recommend using the `expr` command or `bc`.

Additionally, the `calc` function read in the total cost of the purchase, and store it into $cost_in_cents.

You will need to calculate the values for the following given variables:
$limit # the upper bound for your budget (# of guest * cost per person)
$cost # actual cost of the purchase
$tip # the total cost * your tip percentage
$overall_cost # total cost + tip
$average_cost # overall_cost / total guests

We have provided all of the base strings you can use to help match with the solution code. Do not edit the given strings, because the test-cases are very sensitive to the ones that we provided.

function print_message { .. }
This function is given to you. This will print out the statement with the correct variables. Use this at the end when you want to test or debug. Do not change the strings in this function, as it will affect the outcome of the test scripts.

How to Get Started mkdir ~/ScriptingProj cp ~/../public/Scripti...