Jeroo Code

1. Jeroo Code

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. 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. Coding practice Answers: • 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(); • alexandria.hop(); • 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 • LEFT • RIGHT • AHEAD • HERE • Four compass directions • NORTH • SOUTH • EAST • WEST When you turn, you must specify a relative direction

16. The End