Parameters and Return Make

Name(s)_______________________________________________ Period ______ Date ___________________

Activity Guide - Parameters and Return Make

Step 1 - Try the app

Try playing the game. Pay attention to:

What each button does
How the screen gets updated after clicking each button

Step 2 - Plan

This Make project is a little different than other ones. Instead of writing all of the code yourself, most of it has already been written for you. There are just three functions at the bottom that have been designed and have comments explaining how they should work but the code for each function is incomplete or only works for some inputs. Read the comments for these three functions carefully. You can also quickly read the rest of the program if you like.

In the table below record any notes for how you will build each function

	Notes for Building this Function
findIcon()	The icons were already displayed at the top. We coded for every time the specific icon was pressed the right picture would come up. The varIcons was in a list. In our code, every icon had a specific number in that list and that's why we used icons [0] and so on.
randomChoose()	We used a random list access pattern so that the computer will randomly choose an item in this case being rock, paper, or scissors.
decideWinner()	Make an if else statement to show when the player chooses one icon that whatever icon the computer has will either win or lose. If neither the computer or user wins then it will display it as a draw.

Step 3 - Write Your Code

Write the code for the app, using your plan above and the comments provided in Code Studio to help. You can also check the Help & Tips tab for Programming Patterns you can use
Step You Can Follow

Write the code for findIcon() first. Notice that the list of possible icons is available on Line 2
Test your code. Once your program is working you should see the correct icon show up on the game board when you pick rock, paper or scissors.
Write the code to make the randomChoose() function work as described. You should only be working inside that function
Test your code. Once your program is working you should see the computer player is able to pick randomly between rock, paper, and scissors.
Write the code to make the decideWinner() function work as described. You should only be working inside that function
Test your code. Once this function is done your app should be completely working and correctly updating the score on the screen.
For reference: Rock beats Scissors, Paper beats Rock, Scissors beats Paper
Add comments to each of your functions explaining how you wrote the code.
Test the app to make sure it works for every combination of rock, paper, and scissors.

Extension Ideas

Have the game end when one player gets to 10 wins
Keep track of the current streak of wins in the game

Step 4 - Submit

Before your submit check the rubric below to make sure your program

Category	Extensive Evidence	Convincing Evidence	Limited Evidence	No Evidence
findIcon Function	The function returns the correct values for all input values.	The function returns the correct values for most input values.	The function returns the correct values for some input values.	The function does not return correct values for any input values.
randomChoose Function	The function returns the correct values for all input values.	The function returns the correct values for most input values.	The function returns the correct values for some input values.	The function does not return correct values for any input values.
decideWinner Function	The function returns the correct values for all combinations of inputs.	The function returns the correct values for most combinations of inputs.	The function returns the correct values for some combination of inputs.	The function does not return correct values for any combination of inputs
Code runs without errors.	No errors are present in the required code.	Some errors are present in the required code.	Many errors are present in the required code.	The code does not run.
Coding Comments	Comments are used to correctly explain the purpose and functionality of all functions.	Comments are used to explain the purpose and functionality of most functions.	Comments are present, but are not used to explain the purpose or functionality of any functions.	Comments are not present.

Computer Science Principles