Exercise 3: Teaching the computer some tasks
Teaching the computer some tasks
As we explained in the square example, we can start making differences between two types of commands inside a program:
- those that are defined by the language and are useful to express basic operations, such as
Move,DropandGrab. We call them primitive commands, or simply primitive; - and those that are defined by ourselves, which are useful to express more complex tasks. Like the name of this lesson suggests, these are the procedures.
When creating a procedure, we “teach” the computer to carry out a new task, which wasn't originally included in the language.
It would be impossible to write a language that includes EVERYTHING that we may want to do, wouldn't it?
Now it's your turn: write a procedure
Drop3Greenwhich drops 3 green stones in the current cell and aprogramwhich uses it.
Give me a hint!
If you don't know how to start, copy the code of the previous exercise and modify the parts you consider necessary.
procedure DrawBlackSquareSide3() {
Drop(Black)
Move(East)
Drop(Black)
Move(East)
Drop(Black)
Move(North)
Drop(Black)
Move(West)
Drop(Black)
Move(West)
Drop(Black)
Move(North)
Drop(Black)
Move(East)
Drop(Black)
Move(East)
Drop(Black)
}
program {
DrawBlackSquareSide3()
}
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