Worm

Declare, Inches, Lengthworm, DistanceRemaining As Real
Set Lengthworm = 1 Inch
DistanceRemaining = Inches
If DistanceRemaining <= Lengthworm
Then Enter
Otherwise
Repeat
Lengthworm = 1.5 * Lengthworm
Return to Lengthworm
Enter Apple
Eat Apple
End program

Main Module

Declare, Inches, Lengthworm, DistanceRemaining As Real
Call Welcome Message module
Call Input Data module
Call Calculations module
Write “Worm eats apple”
End

Process

Display program title
Display directions
Get worm length
Get distance from apple
Calculate distance (movement)
Output result

Input

Length of worm (from keyboard)
Distance from apple

Output

Worm length * 1.5 when Distance < Worm length
Write “Worm eats apple”
End

Start Main module
Declare Length,Distance as float
Display “Enter the length of the worm”
Input Length
Display “Enter the distance of worm from the apple”
Input Distance
Call MoveWorm Module
End main module

MoveWorm module
While Distance >= 0
Distance = Distance – WormLength
End While
Display “The worm has reached the apple!.”
End MoveWorm module

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It's OK if you don't have much to go on, that's what classes are for.

I believe you have not written programs before, so writing in pseudocode is perfect.

IBM used to recruit people who were asked to do similar problems for a qualifying test.

To help you understand how this works, I suggest you put yourself in the worms shoes, and make yourself a table with three columns.

The first column is "step", i.e. number of times you, the worm, have inched towards the apple.

The second column is the distance from the apple in worm units.

The third column is the question: am I there yet?

On the first row, write 1 in column 1, 5 worm units in column 2, and say no in column three.

Now proceed to complete the second, third, ... until you get to the apple.

Get the idea? Need more details? Don't hesitate to post. | * * programming - Eden, Thursday, October 15, 2009 at 4:30pm would that be process then input then output I for one have never done this before and its been hard trying to put it together i have read and read examples but its not clicking in my head for some reason not sure why?? | * * programming - MathMate, Thursday, October 15, 2009 at 4:42pm Input and output in your example are trivial, and consists of entering the initial distance from the apple, and when the worm got hold of the apple, it would say "Yum, yum!" or something like that.

It's the processing that takes a little more thinking.

The concept that is being introduced in this exercise is looping, or decision making, i.e. when to stop.

If you had completed the table I suggested, you would have gone through the complete step of processing and simple decision making. Don't forget to reduce the distance after every step. | * * programming - Eden , Friday, October 16, 2009 at 4:13pm Okay i did the input output now i have to do design which is Main Module puEnd Main Module, Input Data Module,End input data Module, perform Caclulations Module, Output results Module, And End Output Results Module... Please if you can help me Thanks |
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Maybe if the distace from the apple is D and the length of the worm is W, there is a loop that calculates D = D-W on each cycle.
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while distance>= worm length distance = distance - worm length

Where distance is the distance remaining to the apple.
Start by breaking your problem down into smaller problems, eg, write down with pencil and paper "Move worm:" position = position + 1

etc

Then translate it into the language you are using.

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Main
Declare Length as real
Declare Distance as real
Call Get Length
Call Get Distance
Call Move Worm
End
Get Length
Write “Enter the length of the worm"
Write Get Length
End Get Length
Get Distance
Write "Enter the distance to get to apple"
Get Distance
Get Distance
Move Worm
While Distance > 0
Distance = Distance - Length
End While
Write “Worm has reached the apple."
End Move Worm
A worm is moving toward an apple. Each time it moves, the worm cuts the distance between itself and the apple by its own body length until the worm is close enough to enter the apple. The worm can enter A worm is moving toward an apple. Each time it moves, the worm cuts the distance between itself and the apple by its own body length until the worm is close enough to enter the apple. The worm can enter the apple when it is within a body length of the apple. The apple when it is within a body length of the apple. A worm is moving toward an apple. Each time it moves, the worm cuts the distance between itself and the apple by its own body length until the worm is close enough to enter the apple. The worm can enter the apple when it is within a body length of the apple.