Table 2 Pre-defined macros

Macro     Value
---------------------------------------------
__LINE__  The number of the current source
          line (equal to one more than the
          number of newline characters read
          so far).

__FILE__  The name of the source file.

__DATE__  The date of translation, in the
          form "Mmm dd yyyy."

__TIME__  The time of translation, in the
          form "hh:mm:ss".

__STDC__  1, if the compilation is in
          "standard" mode.