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- .DEMO
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- ET
- TB
- F3
- RT
- RT
- DN
- DN
- DN
- DN
- DN
- RT
- RT
- RT
- LF
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- +This demo describes the programming mode of the Roo environment. Press any key.
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- +Press a key every time you have read a message in this line.
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- +Roo can execute three simple commands: HOP, STEP and TURN (left 90 degrees).
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- +If the cursor is outside the program sheet (like now)...
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- +...then commands are executed but not recorded.
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- +Look how Roo performs the commands.
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- +F1
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- +
- F1
- + F2
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- +
- F2
- + F3
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- +
- F3
- +The boy (named Chris) plays the role of a control device or a teacher.
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- +He explains to us what's going on when the computer performs our programs.
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- +It is a good job for 3-5 years old kids to draw pictures using Roo.
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- +The following picture was drawn by a 4 years old girl.
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- TB
- F4
- F1
- F3
- BS BS BS BS BS BS BS BS BS
- :house
- ET
- Y
- TB
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- +If the cursor is on the program sheet...
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- @ RT @
- +...you can write a program.
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- +You may use main algorithmic constructions: Branchings, Cyclings, Subroutines.
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- +It is very easy to type programs: you need only 9 functional keys.
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- +Let us type one program. Demo will show you the keys you should press.
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- + F4
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- F4
- +F1
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- F1
- + F6
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- F6
- +F1
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- F1
- + F2
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- F2
- + F9
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- F9
- + F2
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- F2
- + F5
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- F5
- + F3
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- F3
- + F9
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- F9
- +F1
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- F1
- +If you want to carry out your program or to use other utilities - press TAB.
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- TB
- +Look: the F-keys line has changed.
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- +Before performing the program, you may set an initial position for Roo with F3.
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- F3 @ DN @ DN @ DN @ DN @ DN @ RT @ RT @ HM @ HM @ ET @
- +You may now carry out your program (press F1).
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- +
- F1
- +You may trace the program step by step (with the help of Chris). Just press F2.
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- F2
- + F3
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- F3
- + F3
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- F3
- + F3
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- +
- F3
- +To get the resulting picture quickly, press F5.
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- F5
- +Our 9 years old students in Lincoln (Nebraska) created complicated programs...
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- +...after the first three lessons devoted to Roo.
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- +We'll now give you a possibility to look at one of their products.
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- F4
- F1
- F1
- BS BS BS BS BS BS BS BS BS
- :forware
- ET
- Y
- +This is the picture drawn by this program:
- F4
- F1
- F3
- BS BS BS BS BS BS BS BS BS
- :forware
- ET
- Y
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- +Now you may look at the program. Press the PAGE DOWN key.
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- PD
- + PAGE DOWN
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- PD
- + PAGE DOWN
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- PD
- + PAGE DOWN
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- PD
- + PAGE DOWN
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- PD
- + PAGE DOWN
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- PD
- + PAGE DOWN
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- PD
- +It is a good job for 6-6O years old programmers to write programs for Roo.
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- +The next picture is drawn by a program written by a professional programmer...
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- +...after an hour of hard work. Let us load these picture and program.
- F4
- F1
- F3
- BS BS BS BS BS BS BS BS BS
- :square
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- Y
- F4
- F1
- F1
- BS BS BS BS BS BS BS BS BS
- :square
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- Y
- TB
- +Let us return to the top of the program sheet and look at the program.
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- PU PU PU PU PU PU PU PU PU
- +This programm can draw the biggest possible square on any sheet.
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- +We are trying, but still cannot shorten this program. Can you?
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- +Would you like to try? After this demo you may carry out our program.
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- +Good luck. In case you will need a quick help, press Ctrl+H
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- + You may do it all:
- ^H
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- ET
- +If you want to look at the next demo, press Ctrl+F to exit. Bye for now.
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