1. Jeroo Code
18-Jul-18

2. Overview In this presentation we will discuss:
How to write code in Jeroo
How to run a Jeroo program

3. Review: Step 1. Create the Environment
To start:
Open an existing Island File
Or Create your own Island
Add or remove:
Flowers
Nets
Water
Land
You can save and re-use your islands.

4. Step 2. Write the program You can create and control up to 4 Jeroos.
Your program must have a main method
Each Jeroo gets a name when it is created
Refer to them by name to send them a message

5. The constructor statement
Jeroo alfred = new Jeroo()
A new Jeroo is created and assigned the name alfred.
alfred will appear in the top left corner of the island, facing east.
All statements in the main program must specify which Jeroo is to act, and what it is to do.
alfred.toss()
tells alfred to toss a flower into the space ahead.

6. Coding practice Answers: Jeroo neo = new Jeroo(); neo.hop( );
Write the code to create a new Jeroo named neo
Write the code to make neo hop
Write the code to make neo turn right.
Jeroo neo = new Jeroo();
neo.hop( );
neo.turn(RIGHT);

7. hopping
hop() alone means hop once in the direction the Jeroo is facing
hop(n) will tell the Jeroo to hop n times
Example:
alexandria.hop(3);
is the same as:
alexandria.hop();
Write the code to make neo hop forward 5 times .
neo.hop(5);

8. Step 3: Run the program
Animation shows Jeroos moving around the island
Source code highlights while executing
You can run one step at a time
Run the whole program continuously
Pause at any time
Go back to the beginning, or stop

9. Watch a program running
the code is highlighted
the Jeroo acts

10. Step 3: Run the program 3 different language modes
You want Java/C++/C#

11. Find the logic errors
Go to Jeroo and demonstrate and fix alexandria

12. Your First Program Start Jeroo Enter your name
1. Create the environment
Clear the island layout.
Place a flower at location Row 3 Column 2
2. Write the program
Create a Jeroo with your name
Tell it to hop to the flower
Tell it to pick the flower
3. Run the program
If it doesn’t work, fix it!

13. The program goes in the main method
Create a Jeroo with your name
Jeroo mrsH = new Jeroo( );
It will appear in location 0,0 facing EAST with no flowers in its pouch.
Tell it to hop onto the location with the flower
mrsH.hop( );
You must address your Jeroo by name.
repeat this statement each time you want your Jeroo to hop mrsH.turn (relative direction);
You must turn either LEFT or RIGHT
Tell it to pick the flower
mrsH.pick( );
It will stop when it reaches the end of the program.

14. Top Grade
Write a program to get a Jeroo from one end of your original letter island to the other using AT LEAST 8 programming steps.
Add a comment to your code with your name in it and print the code.
(comments start with //)

15. Choosing directions Four relative directions Four compass directions
LEFT
RIGHT
AHEAD
HERE
Four compass directions
NORTH
SOUTH
EAST
WEST
When you turn, you must specify a relative direction

16. The End