Programming in C

466 Appendix A C Language Summary

9.3 Predefined Identifiers

The identifiers listed in Table A.8 are defined by the preprocessor.

Ta ble A.8 Predefined Preprocesor Identifiers

Identifier Meaning

__LINE__ Current line number being compiled

__FILE__ Name of the current source file being compiled

__DATE__ Date the file is being compiled, in the format "mm dd yyyy"

__TIME__ Time the file is being compiled, in the format "hh:mm:ss"

__STDC__ Defined as 1 if the compiler conforms to the ANSI standard,

0 if not

__STDC_HOSTED__ Defined as 1 if the implementation is hosted, 0 if not

__STDC_VERSION__ Defined as 199901L

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