1.stdafx.h
The full English name of stdafx is: Standard Application Framework Extensions (an extension of the standard application framework).
The so-called header file
pre-
compilation is to pre-compile some MFC standard header files (such as Windows.H, Afxwin.H) used in a project. precompiled result. This speeds up compilation and saves time.
2. The stdlib header file is the standard library standard library header file. The stdlib header file contains the most commonly used
system
This file contains the definitions of the C language standard
library functions.
Five types, some macros and general utility functions are defined in stdlib.h. Types such as size_t , wchar_t, div_t, ldiv_t and lldiv_t; macros such as EXIT_FAILURE, EXIT_SUCCESS, RAND_MAX and MB_CUR_MAX, etc.; commonly used functions such as malloc(), calloc(), realloc(), free(), system(), atoi( ), atol(), rand(), srand(), exit(), etc. For the specific content, you can open the stdlib.h header file in the include directory of the compiler to see it yourself.