References: Tic-Tac-Toe

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References: Tic-Tac-Toe ‌

The concept of references is simple, but its implications are profound. In this chapter, you’ll learn about references and how they can help you write more efficient game code. Specifically, you’ll learn to:‌

n Create references

n Access and change referenced values

n Pass references to functions to alter argument values or for efficiency

n Return references from a function for efficiency or to alter values

Using References Introducing the Referencing Program Creating References Accessing Referenced Values Altering Referenced Values Passing References to Alter Arguments Introducing the Swap Program Passing by Value Passing by Reference Passing References for Efficiency Introducing the Inventory Displayer Program Understanding the Pitfalls of Reference Passing Declaring Parameters as Constant References Passing a Constant Reference Deciding How to Pass Arguments Returning References Introducing the Inventory Referencer Program Returning a Reference Displaying the Value of a Returned Reference Assigning a Returned Reference to a Reference Assigning a Returned Reference to a Variable Altering an Object through a Returned Reference Introducing the Tic-Tac-Toe Game Planning the Game Setting Up the Program The main() Function The instructions() Function The askYesNo() Function The askNumber() Function The humanPiece() Function The opponent() Function The displayBoard() Function The winner() Function The isLegal() Function The humanMove() Function The computerMove() Function The announceWinner() Function Summary Questions and Answers Discussion Questions Exercises

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