فراتر از گرافیک لاک‌پشتی: کاوش‌های بیشتر در لوگو

I. Logo-More than Pretty Pictures 1 Why Learn Programming in the First Place? 1 Logo's Background and Potential 3 Logo and BASIC-A Comparison 5 How This Book Works 10 II. An Introduction to Logo's Style 13 The Importance of Style 13 The Structure of Logo Commands 14 A Strategy for Program Design 20 III. Computing with Turtles 23 The Turtle as a Computational Object 23 The Power of Procedures 27 The Power of Recursion 29 IV. Computing with Numbers 57 Introducing Logo's Numbers and Simple Operations 57 Logo Integer Operations 61 Special Decimal Operations 65 Random Numbers 71 V. Computing with Words and Lists 81 Duck Soup 82 This Is Predicated to the One I Love 82 First Things First 85 The House that Jack Built 97 Putting Things Together 102 VI. More on Words and Lists 109 Artificial Intelligence 109 From Data to Procedures 110 Solving Mazes 119 Twenty Questions 129 Eliza and the Doctor 135 VII. Computing with Shapes and Sounds 147 The Nature and Representation of Computational Objects 147 The Four-Turtle Problem 151 The Musical Score Object 158 The Geometric Shape Object 170 VIII. Lolly: A Knowledge Base Language You Create Yourself 183 Choosing a Language to Write 183 Representing Knowledge 186 Designing the Primitive Commands 187 Implementation of the Commands 193 Testing the Language 201 IX. Programming in Lolly: Using Your Own Creation 209 Personal Databases 209 Adding Arithmetic to Lolly 213 Adding a Shell to Lolly 215 Extending Lolly: A Challenge 216 X. Logo and the Outside World 225 Working with the Screen and Keyboard 226 Of Turtles and Koalas 232 Farewell Sweet Prints 241 The Plot Thickens 245 Logo Workspaces and Files 248 Appendix 1: Apple Logo II Startup and Operation 253 Setting Up Logo 1/ 253 Appendix 2: Digressions on Sundry Topics 257 Variables Revisited 257 Looping vs. Recursion 258 More Fractals 261 Appendix 3: Description of the Logo Primitives Used in This Book 271 Appendix 4: Books I Wish I Could Have Read Before Learn- ing Logo (and Some I Wish I Had Time to Read Now) 279 Index 283