Header Files in C and C++ :

Header Files Summary

Header files, also called include files, provide function prototype declarations for library functions. Data types and symbolic constants used with the library functions are also defined in them, along with global variables defined by Parijat's C++ and by the library functions. The Parijat's C++ library
follows the ANSI C standard on names of header files and their contents.

Note:    The middle column indicates C++ header files and header files defined by ANSI C.

alloc.h        Declares memory-management functions (allocation, deallocation, and so on). 

assert.h    ANSI C    Defines the assert debugging macro.

bcd.h    C++    Declares the C++ class bcd and the overloaded operators for bcd and bcd math functions.

bios.h        Declares various functions used in calling IBM-PC ROM BIOS routines.

bwcc.h        Defines the Borland Windows Custom Control interface.

checks.h    C++    Defines the class diagnostic macros.

complex.h    C++    Declares the C++ complex math functions.

conio.h        Declares various functions used in calling the operating system console I/O routines.

constrea.h    C++    Defines the conbuf and constream classes.

cstring.h    C++    Defines the string classes.

ctype.h    ANSI C    Contains information used by the character classification and character conversion macros (such as isalpha and

toascii).

date.h    C++    Defines the date class.

_defs.h        Defines the calling conventions for different application types and memory models.

dir.h        Contains structures, macros, and functions for working with directories and path names.

direct.h        Defines structures, macros, and functions for dealing with directories and path names.

dirent.h        Declares functions and structures for POSIX directory operations.

dos.h        Defines various constants and gives declarations needed for DOS and 8086-specific calls. 

errno.h    ANSI C    Defines constant mnemonics for the error codes.

except.h    C++    Declares the exception-handling classes and functions.

excpt.h        Declares C structured exception support.

fcntl.h        Defines symbolic constants used in connection with the library routine open.

file.h    C++    Defines the file class.

float.h    ANSI C    Contains parameters for floating-point routines.

fstream.h    C++    Declares the C++ stream classes that support file input and output.

generic.h    C++    Contains macros for generic class declarations.

io.h        Contains structures and declarations for low-level input/output routines.

iomanip.h    C++    Declares the C++ streams I/O manipulators and contains templates for creating parameterized manipulators.

iostream.h    C++    Declares the basic C++ streams (I/O) routines.

limits.h    ANSI C    Contains environmental parameters, information about compile-time limitations, and ranges of integral quantities.

locale.h    ANSI C    Declares functions that provide country- and language-specific information.

malloc.h        Declares memory-management functions and variables.

math.h    ANSI C    Declares prototypes for the math functions and math error handlers.

mem.h        Declares the memory-manipulation functions. (Many of these are also defined in string.h.)

memory.h        Contains memory-manipulation functions.

new.h    C++    Access to _new_handler, and set_new_handler.

_nfile.h        Defines the maximum number of open files.

_null.h        Defines the value of NULL.

process.h        Contains structures and declarations for the spawn... and exec... functions.

search.h        Declares functions for searching and sorting.

setjmp.h    ANSI C    Declares the functions longjmp and setjmp and defines a type jmp_buf that these functions use.

share.h        Defines parameters used in functions that make use of file-sharing.

signal.h    ANSI C    Defines constants and declarations for use by the signal and raise functions.

stdarg.h    ANSI C    Defines macros used for reading the argument list in functions declared to accept a variable number of arguments

(such as vprintf, vscanf, and so on).

stddef.h    ANSI C    Defines several common data types and macros.

stdio.h    ANSI C    Defines types and macros needed for the standard I/O package defined in Kernighan and Ritchie and extended

under UNIX System V. Defines the standard I/O predefined streams stdin, stdout, stdprn, and stderr and declares

stream-level I/O routines.

stdiostr.h    C++    Declares the C++ (version 2.0) stream classes for use with stdio FILE structures. You should use iostream.h for

new code.

stdlib.h    ANSI C    Declares several commonly used routines such as conversion routines and search/sort routines.

string.h    ANSI C    Declares several string-manipulation and memory-manipulation routines.

strstrea.h    C++    Declares the C++ stream classes for use with byte arrays in memory.

sys\locking.h        Contains definitions for mode parameter of locking function.

sys\stat.h        Defines symbolic constants used for opening and creating files.

sys\timeb.h        Declares the function ftime and the structure timeb that ftime returns.

sys\types.h        Declares the type time_t used with time functions.

thread.h    C++    Defines the thread classes.

time.h    ANSI C    Defines a structure filled in by the time-conversion routines asctime, localtime, and gmtime, and a type used by the

routines ctime, difftime, gmtime, localtime, and stime. It also provides prototypes for these routines.

typeinfo.h    C++    Declares the run-time type information classes.

utime.h        Declares the utime function and the utimbuf struct that it returns.

values.h        Defines important constants, including machine dependencies; provided for UNIX System V compatibility.

varargs.h        Definitions for accessing parameters in functions that accept a variable number of arguments. Provided for UNIX

compatibility; you should use stdarg.h for new code.