◄Up► ◄Contents► ◄Index► ◄Back► ─────Run-Time Library─────────────────────────────────────────────────────── Use the #include directive to instruct the compiler to "include" the contents of another file at this location in your source program: #include <stdio.h> // Standard header file The ".H" files used in C and C++ programs are known as "header files." They contain function prototypes, definitions of constants needed by functions, structures used by the compiler, and other useful information. The header files contained in the Microsoft C/C++ package are listed below, with a brief description of their contents. Move your cursor to a filename of interest and press ENTER to look at the contents of the header file. Filename Major Contents ASSERT.H assert debugging macro BIOS.H BIOS service functions CONIO.H Console and port I/O routines CTYPE.H Character classification DIRECT.H Directory control DOS.H MS-DOS interface functions ERRNO.H errno variable definitions FCNTL.H Flags used in _open and _sopen functions FLOAT.H Constants needed by math functions GRAPH.H Low-level graphics and font routines IO.H File-handling and low-level I/O LIMITS.H Ranges of integers and character types LOCALE.H Localization functions MALLOC.H Memory-allocation functions MATH.H Floating-point-math routines MEMORY.H Buffer-manipulation routines PGCHART.H Presentation graphics PROCESS.H Process-control routines SEARCH.H Searching and sorting functions SETJMP.H setjmp and longjmp functions SHARE.H Flags used in _sopen SIGNAL.H Constants used by signal function STDARG.H Macros for variable-length argument-list functions STDDEF.H Commonly used data types and values STDIO.H Standard I/O header file STDLIB.H Commonly used library functions STRING.H String-manipulation functions TIME.H General time functions VARARGS.H Variable-length argument-list functions VMEMORY.H Virtual memory functions SYS\LOCKING.H Flags used by _locking function SYS\STAT.H File-status structures and functions SYS\TIMEB.H time function SYS\TYPES.H File-status and time types SYS\UTIME.H _utime function -♦-