### ISO/ANSI Standard Predefined Macro Names

Macro Name | Description
--- | ---
__cplusplus | For C++ programs, this macro is set to the integer 1, indicating that the compiler is a C++ compiler. Note that this macro name has no trailing underscores.
__FILE__ | A character string literal containing the name of the source file. The value of __FILE__ changes as the compiler processes include files that are part of your source program. It can be set with the #line directive.
__DATE__ | A character string literal containing the date when the source file was compiled. The value of __DATE__ changes as the compiler processes any include files that are part of your source program. The date is in the form:
    	"Mmm dd yyyy"
where: Mmm - represents the month in an abbreviated form (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, or Dec). dd - represents the day. If the day is less than 10, the first d is a blank character. yyyy - represents the year. The date is always set to the system date.
__LINE__ | An integer representing the current source line number. The value of __LINE__ changes during compilation as the compiler processes subsequent lines of your source program. It can be set with the #line directive.
__STDC__ | For C programs, the compiler sets this macro to the integer 1 (one) to indicate that the C compiler conforms to the ISO/ANSI standard. For C++ programs, this macro is set to the integer 0, indicating that the C++ language is not a proper superset of C, and that the compiler does not conform to ISO/ANSI C.
__TIME__ | A character string literal containing the time when the source file was compiled. The value of __TIME__ changes as the compiler processes any include files that are part of your source program. The time is in the form:
    	"hh:mm:ss"
where: hh - represents the hour. mm - represents the minutes. ss - represents the seconds. The time is always set to the system time.
__TIMESTAMP__ | A character string literal containing the date and time when the source file was last modified. The value of __TIMESTAMP__ changes as the compiler processes any include files that are part of your source program. The date and time are in the form:
    "Day Mmm dd hh:mm:ss yyyy"
where: Day - represents the day of the week (Mon, Tue, Wed, Thu, Fri, Sat, or Sun). Mmm - represents the month in an abbreviated form (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, or Dec). dd - represents the day. If the day is less than 10, the first d is a blank character. hh - represents the hour. mm represents the minutes. ss - represents the seconds. yyyy - represents the year. The date and time are always set to the system date and time.