Learn to Program with Small Basic

Recommendations

Info

Contents in Detail Foreword by Vijaye Raji xvii Acknowledgments xix Introduction Who Should Read This Book? ........................................ xxii What’s in This Book? .............................................. xxii Online Resources ................................................. xxiii A Note to the Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiv xxi 1 Introducing Small Basic 1 What Is a Computer? ................................................ 1 What Is a Computer Program? ......................................... 2 What Is Small Basic? ................................................ 2 The Vision of Small Basic ............................................. 3 The Basics of Small Basic ............................................. 3 The Small Basic Language ...................................... 3 The Small Basic Library ........................................ 4 The Small Basic Development Environment ........................... 4 Installing Small Basic ................................................ 4 The Small Basic IDE ................................................. 4 Opening and Saving Your Work ................................. 5 Sharing Your Work and Importing Games ........................... 5 Copy and Paste; Undo and Redo ................................. 6 Running Your Program and Graduating ............................. 6 Writing and Running Your First Program ................................... 6 Objects and Methods ......................................... 7 Naming Your Programs ........................................ 8 Files Generated by Small Basic. .................................. 8 Helping Hands: IntelliSense and Syntax Coloring ...................... 9 Drawing with Small Basic ............................................. 9 Try It Out 1-1 ........................................... 10 Programming Challenges ............................................ 11 2 Getting Started 13 The Parts of a Program .............................................. 14 Comments and Statements ..................................... 14 Characters and Strings ....................................... 15 Arguments and Methods ...................................... 15 Try It Out 2-1 ........................................... 16
Exploring Other Features. ............................................ 16 Case Sensitivity. ............................................ 16 Sequential Execution ......................................... 17 Displaying Numbers and Doing Math ............................. 17 Joining Strings ............................................. 18 Try It Out 2-2 ........................................... 19 Object Properties .................................................. 19 Setting and Changing Property Values. ............................ 19 Working with Properties. ...................................... 20 Try It Out 2-3 ........................................... 22 Arithmetic Operators ............................................... 22 Try It Out 2-4 ........................................... 23 Programming Errors ................................................ 24 Syntax Errors .............................................. 24 Logic Errors ............................................... 25 Runtime Errors ............................................. 25 Programming Challenges ............................................ 25 3 Drawing Basics 27 The Graphics Coordinate System ....................................... 27 Drawing Lines .................................................... 28 Drawing Shapes .................................................. 30 Triangles ................................................. 30 Try It Out 3-1 ........................................... 30 Rectangles and Squares. ...................................... 31 Try It Out 3-2 ........................................... 32 Ellipses and Circles .......................................... 32 Pen Size and Color .......................................... 34 Pen Width and Shape Size .................................... 34 Try It Out 3-3 ........................................... 35 Drawing Text. .................................................... 35 Inserting Images. .................................................. 38 Programming Challenges ............................................ 39 4 Using Variables 43 What’s a Variable? ................................................ 44 The Basics of Using Variables ......................................... 44 Assigning Expressions to Variables ............................... 45 Passing Variables to Methods ................................... 45 Changing the Value of a Variable. ............................... 46 Using Spaces for Readability ................................... 47 Try It Out 4-1 ........................................... 47 Rules for Naming Variables. .......................................... 47 Say What You Mean. ........................................ 48 Find the Right Length ......................................... 48 viii Contents in Detail
Page 1 and 2: Learn to Program with Small Basic A
Page 4 and 5: Learn to Program with Small Basic A
Page 6: Brief Contents Foreword by Vijaye R
Page 11 and 12: 7 Empowering Programs with math 83
Page 13 and 14: 12 building Graphical User Interfac
Page 15 and 16: Storing Records. ..................
Page 18 and 19: Foreword Computer programming is ma
Page 20 and 21: Acknowledgments This book represent
Page 22 and 23: Introduction Have you ever wondered
Page 24 and 25: • In Chapter 11: Event-Driven Pro
Page 26 and 27: 1 Introducing Small Basic Bill Gate
Page 28 and 29: BASIC language that would help kids
Page 30 and 31: Toolbar Help Area Editor Surface Fi
Page 32 and 33: Then click the New button to open a
Page 34 and 35: Helping Hands: IntelliSense and Syn
Page 36: Programming Challenges If you get s
Page 39 and 40: The Parts of a Program Let’s expl
Page 41 and 42: The method’s name and a brief des
Page 43 and 44: 5 + 7 12 Here’s the output of thi
Page 45 and 46: For example, to make the TextWindow
Page 47 and 48: TRY IT OUT 2-3 Now you have a chanc
Page 49 and 50: Programming Errors Just because a p
Page 51 and 52: 26 Chapter 2 4. Write a program tha
Page 53 and 54: In the system you use at school, po
Page 55 and 56: Drawing Shapes You can draw lots of
Page 57 and 58:
Figure 3-6 shows what the output lo
Page 59 and 60:
22 GraphicsWindow.BrushColor = "Lig
Page 61 and 62:
DrawText() takes three arguments. T
Page 63 and 64:
GraphicsWindow provides two methods
Page 65 and 66:
6. Write a program that draws this
Page 68 and 69:
4 Using Variables Have you ever wan
Page 70 and 71:
Try changing the value in karenBear
Page 72 and 73:
These two ways of updating the scor
Page 74 and 75:
Figure 4-2: How a variable is added
Page 76 and 77:
TRY IT OUT 4-3 Write a program that
Page 78 and 79:
Two Kinds of Data Programs use all
Page 80 and 81:
5 Drawing Shapes with Turtle Graphi
Page 82 and 83:
Absolute Motion With absolute motio
Page 84 and 85:
North 0 (360) 315 (-45) 45 (-315) W
Page 86 and 87:
GraphicsWindow.PenColor = "Red" Gra
Page 88 and 89:
The For loop runs Turtle.Move(60) a
Page 90 and 91:
y 5). For the hexagon (the polygon
Page 92 and 93:
Creating Polygon Art Using Nested L
Page 94 and 95:
Endless Graphics In Listing 5-10 yo
Page 96:
Write a program to have the turtle
Page 99 and 100:
Talking to the Computer Until now,
Page 101 and 102:
Figure 6-2: The text window waiting
Page 103 and 104:
4 C = (5 / 9) * (F - 32) 5 C = Math
Page 105 and 106:
9 noun = TextWindow.Read() 10 11 Te
Page 108 and 109:
7 Empowering Programs with Math If
Page 110 and 111:
Here’s a sample run of our progra
Page 112 and 113:
Round() -4 -3.5 -3 0 3 3.5 4 Round(
Page 114 and 115:
This code snippet shows you some ex
Page 116 and 117:
Let’s walk through this program l
Page 118 and 119:
Trigonometric Methods Trigonometric
Page 120:
Programming Challenges If you get s
Page 123 and 124:
Small Basic uses a few different wa
Page 125 and 126:
You can test all sorts of condition
Page 127 and 128:
Small Basic first finds the value o
Page 129 and 130:
Your mom’s instructions assume th
Page 131 and 132:
But wait, your mom just realized th
Page 133 and 134:
This code asks the user to enter a
Page 136 and 137:
9 Using Decisions to Make Games Som
Page 138 and 139:
Condition 1 True Statement set 1 If
Page 140 and 141:
This change to the program means th
Page 142 and 143:
Door 1 Door 2 Door 3 Figure 9-6: Pe
Page 144 and 145:
Listing 9-4 shows an example of usi
Page 146 and 147:
Think of the Shapes object as a “
Page 148 and 149:
Background image (Grid.png) Star.pn
Page 150 and 151:
In Figure 9-8, you see that the gri
Page 152 and 153:
This code asks the player to enter
Page 154 and 155:
10 Solving Problems with Subroutine
Page 156 and 157:
Gulliver later learned that 1 glum-
Page 158 and 159:
TRY IT OUT 10-1 When Gulliver asked
Page 160 and 161:
variables that belong to the main p
Page 162 and 163:
4 TextWindow.WriteLine("Your turn.
Page 164 and 165:
1 step away). If the arrow hits the
Page 166 and 167:
Then you set the graphics window’
Page 168 and 169:
24 Shapes.SetText(msgText, "") 25 T
Page 170 and 171:
Step 8: Shoot Arrows with ShootArro
Page 172 and 173:
Lines 3-7 animate the dragon’s fi
Page 174 and 175:
11 Event-Driven Programming So far,
Page 176 and 177:
GraphicsWindow Events Let’s start
Page 178 and 179:
4 5 Sub OnKeyDown 6 GraphicsWindow.
Page 180 and 181:
13 Else 14 GraphicsWindow.DrawText(
Page 182 and 183:
Useful Tips Before moving on, we’
Page 184 and 185:
21 GraphicsWindow.BrushColor = "Red
Page 186 and 187:
4 XG = Math.GetRandomNumber(8) - 1
Page 188:
Programming Challenges If you get s
Page 191 and 192:
Today, most programs use a graphica
Page 193 and 194:
located at (100, 100). By default,
Page 195 and 196:
9 GraphicsWindow.MouseMove = OnMous
Page 197 and 198:
Let’s look at the computations. Y
Page 199 and 200:
You start by loading the two backgr
Page 201 and 202:
(line 8). If the total resistance i
Page 203 and 204:
TRY IT OUT 12-4 Write a program to
Page 206 and 207:
13 Repeating For Loops Have you eve
Page 208 and 209:
Each For loop starts with the keywo
Page 210 and 211:
The program uses a variable named s
Page 212 and 213:
TRY IT OUT 13-5 What does the follo
Page 214 and 215:
Nested Loops The statements in the
Page 216 and 217:
Figure 13-7: The output of Stamp.sb
Page 218:
2. Although the pizza in the previo
Page 221 and 222:
In this chapter, you’ll learn how
Page 223 and 224:
Note Although it’s not required b
Page 225 and 226:
asks the user for the correct answe
Page 227 and 228:
to become a value other than 0 (thi
Page 229 and 230:
Step 4: Announce the Winner The las
Page 232 and 233:
15 Grouping Data in One-Dimensional
Page 234 and 235:
One way to think of an array is as
Page 236 and 237:
The string initializer lets you fil
Page 238 and 239:
TextWindow.WriteLine("Enter 5 numbe
Page 240 and 241:
how much money was rescued from eac
Page 242 and 243:
To create this program, we’ll use
Page 244 and 245:
The apples fall from the trees. Usi
Page 246 and 247:
The subroutine uses a For loop to c
Page 248 and 249:
9 If ((xdiff < 20) And (ydiff < 20)
Page 250:
4. Open the file USMapQuiz_Incomple
Page 253 and 254:
Associative Arrays In the previous
Page 255 and 256:
The expression If("ernie" = "Ernie"
Page 257 and 258:
Here’s the output from a sample r
Page 259 and 260:
The ContainsIndex() method takes tw
Page 261 and 262:
Figure 16-1 shows the user interfac
Page 263 and 264:
1 Sub OnButtonClicked 2 GraphicsWin
Page 266 and 267:
17 Expanding to Higher-Dimension Ar
Page 268 and 269:
1 ' Random2DArray.sb 2 For r = 1 To
Page 270 and 271:
Animated Squares Let’s write a pr
Page 272 and 273:
12 TextWindow.Write("Enter student
Page 274 and 275:
(line 8). Line 9 displays Scott's M
Page 276 and 277:
You start by initializing the sum v
Page 278 and 279:
4 For col = 1 To 4 ' For each colum
Page 280 and 281:
note If you run into any problems,
Page 282 and 283:
First, you set all the elements of
Page 284 and 285:
11 If ((rowP < 1) Or (rowP > 10) Or
Page 286:
Open the file Okla.sb from this cha
Page 289 and 290:
(both uppercase and lowercase), dig
Page 291 and 292:
Taking Strings Apart: Substrings Ju
Page 293 and 294:
two arguments: the source string th
Page 295 and 296:
Here’s an output example: Who's y
Page 297 and 298:
More on Code Points The Unicode cod
Page 299 and 300:
Line 7 gets the Nth character of th
Page 301 and 302:
Igpay Atinlay Let’s teach the com
Page 303 and 304:
17 TextWindow.WriteLine("Good Job!"
Page 305 and 306:
9 pos = Math.GetRandomNumber(len) '
Page 307 and 308:
When you continue with the second a
Page 309 and 310:
TRY IT OUT 18-10 Use the techniques
Page 312 and 313:
19 Receiving File Input and Output
Page 314 and 315:
and their meanings. File extensions
Page 316 and 317:
program’s folder (right-click the
Page 318 and 319:
in the file would run together in o
Page 320 and 321:
Let’s experiment with the first p
Page 322 and 323:
line number. As with the WriteLine(
Page 324 and 325:
WARNING If the destination path poi
Page 326 and 327:
6 For N = 1 To count ' Displays the
Page 328 and 329:
wizard asks the user to perform. Th
Page 330 and 331:
Figure 19-8 shows a sample run of t
Page 332 and 333:
Where to Go from Here So you’ve m
Page 334 and 335:
Index Numbers and Symbols 3DArrayDe
Page 336 and 337:
squares, 31-32 star, 65-66 triangle
Page 338 and 339:
integrated development environment
Page 340 and 341:
parts of, 14-16 publishing, 5-6 run
Page 342 and 343:
NewGame() subroutine, 255-256 OnBut
Page 344:
ages 10 and up “Welcome to the ma
show all

Learn to Program with Small Basic

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?