Liangxu Linux
May 19, 2025 · Fundamentals
Understanding C Macro Expansion: When Parameters Expand and When They Don’t
This article explains the C preprocessor's macro‑expansion rules, detailing when macro arguments are expanded, how replacement‑list macros behave, special cases involving the # and ## operators, and provides step‑by‑step examples and techniques for controlling expansion.
CC languageMacro Expansion
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