Learn to Program with Small Basic

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Figure 19-8 shows a sample run of the program. Figure 19-8: Sample output of the Math Wizard program TRY IT OUT 19-3 Think of ways to improve the Math Wizard program, and try to implement them. For example, add some colors to make the output look fancier or draw something after each puzzle. Programming Challenges If you get stuck, check out http://nostarch.com/smallbasic/ for the solutions and for more resources and review questions for teachers and students. 1. Let’s write a spelling quiz game using homonyms. Homonyms are words that sound the same but have different meanings. Use Notepad to create the following text file: In your math class;ad/add;add Halloween queen;which/witch;witch Eyes do this;sea/see;see In the church;altar/alter;altar A rabbit;hair/hare;hare A good story;tail/tale;tale Animals have them;clause/claws;claws Pencils do this;right/write;write Each line in this file contains three fields separated by semicolons. The first field is the hint you’ll show the player, such as In your math class. The second field is the two possible answers that your player will choose from, such as ad/add. The third field is the correct answer, such as add. In each round, have the program display the hint and the two possible answers to the player, and then wait for them to enter their answer. Have the program compare the user’s answer with the correct answer, and then let them know whether their answer is correct. Receiving File Input and Output 305
2. Write a science quiz that tests the student’s knowledge of the animal kingdom. First, use Notepad to create the following text file: 1=Invertebrates;2=Fish;3=Amphibians;4=Reptiles;5=Birds;6=Mammals Bat;6 Clam;1 Dog;6 Frog;3 Lizard;4 Peacock;5 Salamander;3 Salmon;2 Spider;1 Turkey;5 Turtle;4 The first line contains the possible classifications. Each of the remaining lines contains an animal’s name and its correct classification. Display an animal’s name to the player, and then ask them to classify that animal by entering the number of the correct class. Then process the player’s answer and let them know whether their answer is correct; if their answer is incorrect, display the correct classification. 306 Chapter 19
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Learn to Program with Small Basic A
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Learn to Program with Small Basic A
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Brief Contents Foreword by Vijaye R
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Exploring Other Features. .........
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7 Empowering Programs with math 83
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12 building Graphical User Interfac
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Storing Records. ..................
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Foreword Computer programming is ma
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Acknowledgments This book represent
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Introduction Have you ever wondered
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• In Chapter 11: Event-Driven Pro
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1 Introducing Small Basic Bill Gate
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BASIC language that would help kids
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Toolbar Help Area Editor Surface Fi
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Then click the New button to open a
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Helping Hands: IntelliSense and Syn
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Programming Challenges If you get s
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The Parts of a Program Let’s expl
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The method’s name and a brief des
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5 + 7 12 Here’s the output of thi
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For example, to make the TextWindow
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TRY IT OUT 2-3 Now you have a chanc
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Programming Errors Just because a p
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26 Chapter 2 4. Write a program tha
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In the system you use at school, po
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Drawing Shapes You can draw lots of
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Figure 3-6 shows what the output lo
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22 GraphicsWindow.BrushColor = "Lig
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DrawText() takes three arguments. T
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GraphicsWindow provides two methods
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6. Write a program that draws this
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4 Using Variables Have you ever wan
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Try changing the value in karenBear
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These two ways of updating the scor
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Figure 4-2: How a variable is added
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TRY IT OUT 4-3 Write a program that
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Two Kinds of Data Programs use all
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5 Drawing Shapes with Turtle Graphi
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Absolute Motion With absolute motio
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North 0 (360) 315 (-45) 45 (-315) W
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GraphicsWindow.PenColor = "Red" Gra
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The For loop runs Turtle.Move(60) a
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y 5). For the hexagon (the polygon
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Creating Polygon Art Using Nested L
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Endless Graphics In Listing 5-10 yo
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Write a program to have the turtle
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Talking to the Computer Until now,
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Figure 6-2: The text window waiting
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4 C = (5 / 9) * (F - 32) 5 C = Math
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9 noun = TextWindow.Read() 10 11 Te
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7 Empowering Programs with Math If
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Here’s a sample run of our progra
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Round() -4 -3.5 -3 0 3 3.5 4 Round(
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This code snippet shows you some ex
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Let’s walk through this program l
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Trigonometric Methods Trigonometric
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Small Basic uses a few different wa
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You can test all sorts of condition
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Small Basic first finds the value o
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Your mom’s instructions assume th
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But wait, your mom just realized th
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This code asks the user to enter a
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9 Using Decisions to Make Games Som
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Condition 1 True Statement set 1 If
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This change to the program means th
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Door 1 Door 2 Door 3 Figure 9-6: Pe
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Listing 9-4 shows an example of usi
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Think of the Shapes object as a “
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Background image (Grid.png) Star.pn
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In Figure 9-8, you see that the gri
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This code asks the player to enter
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10 Solving Problems with Subroutine
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Gulliver later learned that 1 glum-
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TRY IT OUT 10-1 When Gulliver asked
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variables that belong to the main p
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4 TextWindow.WriteLine("Your turn.
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1 step away). If the arrow hits the
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Then you set the graphics window’
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24 Shapes.SetText(msgText, "") 25 T
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Step 8: Shoot Arrows with ShootArro
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Lines 3-7 animate the dragon’s fi
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11 Event-Driven Programming So far,
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GraphicsWindow Events Let’s start
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4 5 Sub OnKeyDown 6 GraphicsWindow.
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13 Else 14 GraphicsWindow.DrawText(
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Useful Tips Before moving on, we’
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21 GraphicsWindow.BrushColor = "Red
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4 XG = Math.GetRandomNumber(8) - 1
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Today, most programs use a graphica
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located at (100, 100). By default,
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9 GraphicsWindow.MouseMove = OnMous
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Let’s look at the computations. Y
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You start by loading the two backgr
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(line 8). If the total resistance i
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TRY IT OUT 12-4 Write a program to
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13 Repeating For Loops Have you eve
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Each For loop starts with the keywo
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The program uses a variable named s
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TRY IT OUT 13-5 What does the follo
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Nested Loops The statements in the
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Figure 13-7: The output of Stamp.sb
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2. Although the pizza in the previo
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In this chapter, you’ll learn how
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Note Although it’s not required b
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asks the user for the correct answe
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to become a value other than 0 (thi
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Step 4: Announce the Winner The las
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15 Grouping Data in One-Dimensional
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One way to think of an array is as
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The string initializer lets you fil
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TextWindow.WriteLine("Enter 5 numbe
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how much money was rescued from eac
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To create this program, we’ll use
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The apples fall from the trees. Usi
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The subroutine uses a For loop to c
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9 If ((xdiff < 20) And (ydiff < 20)
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4. Open the file USMapQuiz_Incomple
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Associative Arrays In the previous
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The expression If("ernie" = "Ernie"
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Here’s the output from a sample r
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The ContainsIndex() method takes tw
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Figure 16-1 shows the user interfac
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1 Sub OnButtonClicked 2 GraphicsWin
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17 Expanding to Higher-Dimension Ar
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1 ' Random2DArray.sb 2 For r = 1 To
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Animated Squares Let’s write a pr
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12 TextWindow.Write("Enter student
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(line 8). Line 9 displays Scott's M
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You start by initializing the sum v
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4 For col = 1 To 4 ' For each colum
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Page 295 and 296: Here’s an output example: Who's y
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Page 303 and 304: 17 TextWindow.WriteLine("Good Job!"
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Page 309 and 310: TRY IT OUT 18-10 Use the techniques
Page 312 and 313: 19 Receiving File Input and Output
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Page 326 and 327: 6 For N = 1 To count ' Displays the
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Page 332 and 333: Where to Go from Here So you’ve m
Page 334 and 335: Index Numbers and Symbols 3DArrayDe
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Page 338 and 339: integrated development environment
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Page 342 and 343: NewGame() subroutine, 255-256 OnBut
Page 344: ages 10 and up “Welcome to the ma
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Learn to Program with Small Basic

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