Multi-File C and C++ Projects: Compilation and Linking

Structuring real-world software across multiple files is essential for writing clean, maintainable, and scalable programs. This written course guides you step by step through the mechanics of translation units, object files, and the linking process. You will begin with foundational concepts, including preprocessor directives, declarations versus definitions, and the distinction between compile-time and link-time operations. What you'll learn: Understand how compilers transform individual source files into object files; Manage header files, include guards, and declarations to avoid circular dependencies; Resolve common linker errors such as undefined references and duplicate symbol definitions; Organize modular software architectures into clean interfaces and implementations; Apply basic build automation principles using standard Makefiles and modern build tools. The course starts with clear definitions and core theory before advancing into modular code patterns and practical multi-file architectures. Designed for programmers who are comfortable with basic syntax and ready to build scalable, multi-file projects, no previous build system experience is required. Start reading today to master the C and C++ build pipeline.