C Preprocessor Directives: A Complete Guide
Predefined Symbols
The C language provides several predefined symbols that are available for direct use during preprocessing:
__FILE__ // Source file being compiled
__DATE__ // Compilation date
__TIME__ // Compilation time
__LINE__ // Current line number in the source
__STDC__ // 1 if compiler conforms to ANSI C, undefined otherwise
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Posted on Fri, 03 Jul 2026 16:06:38 +0000 by ramma03