What are the standard predefined macros?

Predefined Macros Visual Studio 2015 Other Versions Lists the predefined preprocessor macros for standards support, and Microsoft-specific predefined preprocessor macros. The compiler recognizes the required predefined preprocessor macros specified by the ANSI/ISO C99 standard and the ISO C++17 standard. The Microsoft C++ implementation provides several more. These preprocessor macros take no arguments and cannot be redefined. Some of the predefined macros are defined with values that are specific to the build environment or the specified compiler options. Standard predefined identifier The compiler supports this predefined identifier specified by ISO C99 and ISO C++11. __func__ The unqualified and unadorned name of the enclosing function as a function-local static const array of char. void example(){ printf("%s\n", __func__); } // prints “example” Standard predefined macros The compiler supports these predefined macros specified by the ISO C99 and ISO C++17 standards. __cplusplus An integer literal value when compiling a translation unit as C++. Otherwise undefined. __DATE__ The compilation date of the current source file. The date is a string literal of the form Mmm dd yyyy. The month name Mmm is the same as the month name for dates generated by the library function asctime declared in (time.h) headerfile. The first character of dd is a space if the value is less than 10. __FILE__ The name of the current source file. __FILE__ expands to a character string literal. To ensure that the full path to the file is displayed, use -FC (Full Path of Source Code File in Diagnostics). __LINE__ The line number in the current source file. The line number is an integer constant. It can be changed by using a #line directive. __STDC__ Defined as the integer literal constant 1 only when compiling a translation unit as C and if the /Za compiler option is given. Otherwise, undefined. __STDC_HOSTED__ The integer constant 1 if the implementation is a hosted implementation, one that supports the entire required standard library. Otherwise, the integer constant 0. __STDCPP_THREADS__ Defined as the integer constant 1 if and only if a program can have more than one thread of execution. Otherwise undefined. __TIME__ The time of translation of the preprocessing translation unit. The time is a character string literal of the form hh:mm:ss, the same as the time generated by the library function asctime. read less