Week 3, Lesson 1

This lesson focuses on an important topic for scaling up our programs: multifile compilation. We will explore how to break up our code into multiple files.

It addresses the following Group 3 learning goals:

• Goal 3A: Compilation Stages:

  • Describe the stages of compilation and recognize common errors and their causes at various stages.

• Goal 3B: Compilation Commands:

  • Write compilation commands to compile a multifile program
    • For the first time
    • To recompile it recompile after a change (compiling only the files necessary).

• Goal 3C: Program Organization:

  • Explain the division of code into header and source files.
  • Use #include directives to ensure that declarations of variables, classes, functions, etc. are visible.

• Goal 3D: Include Guards:

  • Identify the problem that include guards address.
  • Implement a valid include guard.

Outline

• Before You Start…
• Why Multiple Files?
• A Multifile Program
• Exercise: Compiling a Multifile Program

(Maybe take a stretch break if you want?)

• #include Directives
• Header Files
• Another Problem
• Include Guards
• Should a Source File Include Its Own Header File?

(This is another good spot for a quick break!)

• Error Messages
• Header Files and Recompilation
• Key Points
• Before You Go…

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