COMP203 Assignment 2

COMP203: Assignment 2

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Write a procedure hexagon that accepts a number (say, :size) as input and draws a hexagon with that side length.

Write a procedure hexpicture that uses your hexagon procedure to draw hexagons of different size that together make up a picture (Here are some examples using squares: example 1, example 2).

Read the textbook's rules for nonsense plumbing diagrams on page 37 (in particular, in these examples you can tell how many inputs a procedure accepts by looking at its name) then draw the plumbing diagram for:
```
with3 test2 [a b] [c d] [e f] [g h]
```

On page 56 of the text the author proposes replacing the old converse procedure on page 44:

to converse
print [Please type your full name.]
halves readlist
end

to halves :name
print sentence [Your first name is] first :name
print sentence [Your last name is] last :name
end

with the following:

to new.converse
local "name
print [Please type your full name.]
make "name readlist
print sentence [Your first name is] first :name
print sentence [Your last name is] last :name
end

Which version of converse do you prefer -- the one that requires two separate procedures in order to run, or the one that requires a local variable name in order to run? Give reasons for your preference.

The variable name is not defined in the procedure halves2 below; try running halves2. Now run procedure converse2. Note that halves2 is a subprocedure of converse2 -- why doesn't halves2 produce an error message when run from converse2?
```
to converse2
local "name
print [Please type your full name.]
make "name readlist
halves2
end

to halves2
print sentence [Your first name is] first :name
print sentence [Your last name is] last :name
end
```
Hint: Read the section on "Scope of Variables" that starts on page 49.

Bonus (5 pts) Write the helper procedure sc1 described on page 54 of the text.