CSC 230: Week of 10/11/10

CSC 230: The Week beginning Oct. 11

Homework:

Provide a brief definition of the following terms (in the interface programming context):
- Array
- Array element
- Array index
- Sort an array
- Search an array
If you use a source (book or web site), cite your source. (The sites http://whatis.techtarget.com/ and http://www.webopedia.com/ are decent sources for technical definitions.)

Give an example of Visual Basic code that
- Declares an array
- Instantiates an array
- Initializes an array
State Capital Quiz (Instructions for this week's homework.)
StateCapitalHeadStart.txt

Due: Oct. 22 (Changed to Friday, off Monday and have Test 2 on Wednesday)
Monday:

ConvertToBinary.zip (example of while loop)
GoFish2.zip (shuffles an array)
HomageToTheSquare.zip
MultiLogon.zip Uses IndexOf and idea of parallel array
Wednesday (morning):

AllWork3.zip
HBD2.zip
We discussed changing the Multi-user logon program from Monday to make the username matching case insensitive, which we did by putting all of the username array elements into lower case and using the ToLower method on what the user entered in the TextBox. We went on to consider the possibility of "white space" at the beginning or end of the TextBox entry, and we used the Trim method to eliminate that. Someone asked about spaces within the entry and if we wanted to eliminate those we could use the Replace method. Ultimately we ended up with the following code
```
        UserIndex = Array.IndexOf(Username, txtUsername.Text.ToLower.Trim.Replace(" ", ""))
        
```
We started think about a multiple choice quiz. One issue was that there were many choices for many questions. We suggested that there were two approaches to this -- either make the Choices a two-dimensional array or make the Choices a long string with the various choices concatenated together with some delimiter (separator). This long string would then have to be parsed (split). We demonstrated this parsing with the following program (which is far from done).

Quiz.zip

Wednesday (afternoon):

Art SlideShow

Art Slide Show Instructions
ArtSlideShowZip.zip (image files and exe)
ArtistSlideShowHeadStart.txt

Professor Poopypants

PoopyPants.exe uses Prof_Poopypants.gif
Use (R,G,B) of (0, 102, 204) for the Form's BackColor to math the blue in the image. Take the third letter of the user's first name, the second and fourth letters of the user's last name, and find the corresponding silly name. The code

        FirstName.ToUpper.Substring(2, 1)

takes a string variable called FirstName and capitalizes all of the letters (ToUpper) and then makes a substring -- a part of a string -- starting at the third position (the letter with an index of 2 where we started with index 0) which has a length of one. This is the third letter. Find the IndexOf that letter in the Letter Array (see below), then use the first silly name with the same index (Poopy1, see below). (If the person's name was not long enough, choose an index at random.) Finally concatenate the two silly names derived from the user's last name.
Here is a head start on the array declarations:

    Dim Poopy1 As String() = New String() {"poopsie", "lumpy", "buttercup", "gidget", "crusty", _
                                           "greasy", "fluffy", "cheeseball", "chim-chim", "stinky", _
                                           "flunky", "booger", "pinky", "zippy", "goober", "doofus", _
                                           "slimy", "loopy", "snotty", "tulefel", "dorkey", "squeezit", _
                                           "oprah", "skipper", "dinky", "zsazsa"}

    Dim Poopy2 As String() = New String() {"diaper", "toilet", "giggle", "burger", "girdle", "barf", _
                                           "lizard", "waffle", "cootie", "monkey", "potty", "liver", _
                                           "banana", "rhino", "bubble", "hamster", "toad", "gizzard", _
                                           "pizza", "gerbil", "chicken", "pickle", "chuckle", "tofu", _
                                           "gorilla", "stinke"}

    Dim Poopy3 As String() = New String() {"head", "mouth", "face", "nose", "tush", "breath", "pants", _
                                           "shorts", "lips", "honker", "butt", "brain", "tushie", _
                                           "chunks", "hiney", "biscuits", "toes", "buns", "fanny", _
                                           "sniffer", "sprinkles", "kisser", "squirt", "humperdinck", _
                                           "brains", "juice"}

    Dim Letter As String() = New String() {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", _
                                           "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"}

(Reference: http://www.optioninsight.com/CaptainUnderpants.html)

Test next Wednesday includes loops and timers, does not include arrays.

Friday:

Depreciation.zip Reviewed loops by looking at the "straight-line" depreciation problem.
Quiz2.zip