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| 删除的内容标记成这样。 | 加入的内容标记成这样。 |
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| [[Include(^TCPL/4\.11.*,,titlesonly)]] | [[Include(^TCPL/4\.11\..*,,titlesonly)]] |
4.11 The C Preprocessor
C provides certain language facilities by means of a preprocessor, which is conceptionally a separate first step in compilation. The two most frequently used features are #include, to include the contents of a file during compilation, and #define, to replace a token by an arbitrary sequence of characters. Other features described in this section include conditional compilation and macros with arguments.