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There are 80 macros defined by Standard C. Most of them are
described in the relevant header file pages, but some are listed
here. The first column contains the macro name, the second
column the header file in which the macro is defined, and the third
column gives a description of the macro. If the macro has been
described elsewhere, the second column provides a link to the
reference, and the third column is blank. Groups of similar
macro names are suffixed with * and the second column
refers to the relevant header file.
BUFSIZ |
<stdio.h> | The preferred size of stream buffers. Used by setbuf. | ||
CHAR_* |
See <limits.h> | |||
CLOCKS_PER_SEC |
<time.h> | clock()/CLOCKS_PER_SEC gives elapsed processor
time in seconds. |
||
DBL_* |
See <float.h> | |||
EDOM |
<errno.h> | Reported on a domain error. | ||
EFPOS |
<errno.h> | Not a widely used name; used by functions that alter file position. | ||
EOF |
<stdio.h> | Used to signal end-of-file. It has negative value. See this EOF description for more information. | ||
ERANGE |
<errno.h> | Reported on an underflow or overflow. | ||
EXIT_FAILURE |
<stdlib.h> | Argument to exit, or return value from
main, for failure.
|
||
EXIT_SUCCESS |
<stdlib.h> | Argument to exit, or return value from
main, for success.
|
||
FILE |
<stdio.h> | Control block that records state of a stream. | ||
FILENAME_MAX |
<stdio.h> | Length of a character buffer large enough to hold a file name. | ||
FLT_* |
See <float.h> | |||
FOPEN_MAX |
<stdio.h> | How many files your program can have open, at a minimum. | ||
HUGE_VAL |
<math.h> | The IEEE 754 code for +Inf. | ||
INT_* |
See <limits.h> | |||
LC_ALL |
<locale.h> | First argument to setlocale - all categories. |
||
LC_COLLATE |
<locale.h> | First argument to setlocale - collation
sequences. |
||
LC_CTYPE |
<locale.h> | First argument to setlocale - classification of
characters. |
||
LC_MONETARY |
<locale.h> | First argument to setlocale - monetary
formatting. |
||
LC_NUMERIC |
<locale.h> | First argument to setlocale - other numeric
formatting. |
||
LC_TIME |
<locale.h> | First argument to setlocale - times. |
||
LDBL_* |
See <float.h> | |||
LONG_* |
See <limits.h> | |||
L_tmpnam |
<stdio.h> | Length of a character buffer large enough to hold a temporary file name. | ||
MB_CUR_MAX |
<stdlib.h> | Maximum length for a multibyte sequence. | ||
MB_LEN_MAX |
<limits.h> | Maximum number of bytes in multibyte character, for any supported locale. | ||
NULL |
<locale.h> <stddef.h> <stdio.h> <stdlib.h> <string.h> <time.h> |
Almost-universal null pointer constant. See this NULL description for more information. | ||
RAND_MAX |
<stdlib.h> | Use this value to scale values returned from rand. | ||
SCHAR_* |
See <limits.h> | |||
SEEK_CUR |
<stdio.h> | Third argument (origin) to fseek - current position. | ||
SEEK_END |
<stdio.h> | Third argument (origin) to fseek - end of file. | ||
SEEK_SET |
<stdio.h> | Third argument (origin) to fseek - beginning. | ||
SHRT_* |
See <limits.h> | |||
SIG* |
See <signal.h> | |||
TMP_MAX |
<stdio.h> | The number of distinct file names tmpnam creates before repeating. | ||
U* |
See <limits.h> | |||
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Last modified: Fri Dec 15 2000
