Truth, Branching, and the Game Loop: Guess My Number

Truth, Branching, and the Game Loop: Guess My Number ‌

So far, the programs you’ve seen have been linear—each statement executes, in order, from top to bottom. However, to create interesting games, you need to write programs that execute (or skip) sections of code based on some condition. That’s the main topic of this chapter. Specifically, you’ll learn to:

n Understand truth (as C++ defines it)

n Use if statements to branch to sections of code

n Use switch statements to select a section of code to execute

n Use while and do loops to repeat sections of code

n Generate random numbers

Understanding Truth Using the if Statement Introducing the Score Rater Program Testing true and false Interpreting a Value as true or false Using Relational Operators Nesting if Statements Using the else Clause Introducing the Score Rater 2.0 Program Creating Two Ways to Branch Using a Sequence of if Statements with else Clauses Introducing the Score Rater 3.0 Program Using the switch Statement Introducing the Menu Chooser Program Creating Multiple Ways to Branch Using while Loops Introducing the Play Again Program Looping with a while Loop Using do Loops Introducing the Play Again 2.0 Program Looping with a do Loop Using break and continue Statements Introducing the Finicky Counter Program Creating a while (true) Loop Using the break Statement to Exit a Loop Using the continue Statement to Jump Back to the Top of a Loop Understanding When to Use break and continue Using Logical Operators Introducing the Designers Network Program Using the Logical AND Operator Using the Logical OR Operator Using the Logical NOT Operator Understanding Order of Operations Generating Random Numbers Introducing the Die Roller Program Calling the rand() Function Seeding the Random Number Generator Calculating a Number within a Range Understanding the Game Loop Introducing Guess My Number Applying the Game Loop Setting Up the Game Creating the Game Loop Wrapping Up the Game Summary Questions and Answers Discussion Questions Exercises

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