STDIO 3 2001-12-26
STDIO
NAMESYNOPSIS æ»è§
DESCRIPTION æè¿°
LIST OF FUNCTIONS å½æ°å表
CONFORMING TO æ ååè
SEE ALSO åè§
è·
NAME
stdio - æ åè¾å¥è¾åºåºå½æ°
SYNOPSIS æ»è§
#include <stdio.h>
FILE *stdin;
FILE *stdout;
FILE *stderr;
DESCRIPTION æè¿°
æ 注 I/O åºå½æ°æä¾äºä¸ä¸ªç®åèææçï¼å¸¦ç¼å²çæµè¾åºè¾åºæ¥å£ãè¾å¥åè¾åºè¢«æå°ä¸ºé»è¾çæ°æ®æµï¼ç©çç I/O ç¹æ§å被éèèµ·æ¥ãåºä¸åå«çå½æ°ä¸å®åå¨ä¸é¢ï¼æ´å¤ä¿¡æ¯å¯ä»¥ä»ç¬ç«ç man æå页ä¸å¾å°ã
å°ä¸ä¸ªæµå³èå°ä¸ä¸ªå¤é¨æ件 (å¯è½æ¯ä¸ä¸ªç©ç设å¤) çæ¹æ³æ¯æå¼ ( opening ) è¿ä¸ªæ件ï¼å¶ä¸å¯è½çµæ¶å°å建ä¸ä¸ªæ°æ件ãå建已æçæ件使å¾æ件ä¸- å·²æçå容被丢å¼ãå¦ææ件æ¯æå®ä½è¯·æ± (ä¾å¦ç£çæ件ï¼ä½ç»ç«¯ä¸æ¯è¿æ ·)ï¼é£ä¹ä¸ä¸ªä¸æ件å³èçå®ä½æ è®° ( file position indicator ) 被å®ä½å°æ件çèµ·å§ (0 å- è)ï¼é¤é以追å模å¼æå¼æ件ã使ç¨è¿½å模å¼æ¶ï¼ç©¶ç«å®ä½æè®°ä½äºæ件çå¼å§è¿æ¯ç»ææ¯æ²¡ææå®çãå®ä½æè®°ç±åç»- ç读ãååå®ä½è¯·æ±æ¥ç»´æ¤ãä»æµä¸è¾å¥æ¶ï¼å°±å¦åå符æ¯è¿ç»å°æåè°ç¨äºå½æ° fgetc(3) è读å¥çï¼äº§çè¾åºæ¶ï¼å°±å¦åææå符æ¯è¿ç»å°æåè°ç¨äºå½æ° fputc(3) èè¾åºçã
å°ä¸ä¸ªæµä¸ä¸ä¸ªä¸ä¹å³èçæ件æå¼çåæ³æ¯å³é ( closing ) è¿ä¸ªæ件ãå¨æµä¸æ件æå¼ä¹åï¼è¾åºæµè¢«å·æ° (ä»»ä½æªåå¥çç¼å²çå容é½è¢«ä¼ è¾ç»ä¸»æºç¯å¢)ãå¨æ件被å³éä¹åï¼æå FILE 对象çæéçå¼æ¯ä¸ç¡®å®ç (æ ç¨æ°æ®)ã
ä¸ä¸ªæ件å¯ä»¥ç»§ç»- 被ç¸åçææ¯ä¸åçç¨åºå®ä½å次æå¼ï¼å®çå容å¯ä»¥è¢«æ¢å¤æèä¿®æ¹ (å¦æå®å¯ä»¥è¢«éå®ä½å°æ件å¼å§çè¯)ãå¦æ main å½æ°è¿åå°å®æåçè°ç¨èï¼æèè°ç¨äºå½æ° exit(3) ï¼å¨ç¨åºç»æ- ¢åï¼æææå¼çæ件é½å°è¢«å³é (å æ¤ææçè¾åºæµé½è¢«å·æ°)ãå¶ä»ç»æ- ¢ç¨åºçæ¹æ³ï¼ä¾å¦ abort(3) ä¸ä¼è¿è¡æ£å¸¸çå³éæ件æä½ã
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æåç»ç«¯è®¾å¤çè¾åºæµæ»æ¯é»è®¤ä½¿ç¨è¡ç¼å²ï¼æªå®çè¾åºæ»æ¯å¨æåä¸ä¸ªç»ç«¯è®¾å¤çè¾å¥æµè¢«è¯»åæ¶èªå¨è¢«åå¥ãå¦æå¨ä¸ä¸ªè¾åºç»ç«¯ä¸æå°äºä¸è¡çä¸é¨åï¼ç¶åè¿è¡äºå¤§éç计ç®åï¼åºå½å¨éåºå计ç®å fflush(3) æ åè¾åºï¼ä½¿å¾è¾åºå¯ä»¥æ¾ç¤ºåºæ¥ã(?)
æ åè¾å¥è¾åºåº stdio æ¯å½æ°åº libc çä¸é¨åï¼éè¦æ¶å¯ä»¥è¢«ç¼è¯å¨ cc(1) å pc(1) èªå¨å è½½ãä¸åæå页ç SYNOPSIS æ»è§ 段è½ä¼æåºè¦åå«åªäºæ件ï¼å½æ°å®ä¹çæ ¼å¼ï¼ä»¥åå®ä»¬åå°åªäºå¤é¨åéçå½±åã
ä¸å为已å®ä¹çå®ï¼å¦æä¸ç¨ #undef åæ¶è¿äºå称çå½åå®ä¹çè¯ï¼æ¯ä¸è½éæ°ä½¿ç¨å®ä»¬çï¼ BUFSIZ, EOF, FILENAME_MAX, FOPEN_MAX, L_cuserid, L_ctermid, L_tmpnam, NULL, SEEK_END, SEEK_SET, SEE_CUR, TMP_MAX, clearerr, feof, ferror, fileno, fropen, fwopen, getc, getchar, putc, putchar, stderr, stdin, stdout. å¦å¤ï¼è¿æä¸è¿äºå®çåè½å¯¹åºçï¼å½æ°å½¢å¼ççæ¬ feof, ferror, clearerr, fileno, getc, getchar, putc, å putchar ï¼å¨æ¾å¼å°åæ¶å®çå®ä¹æ¶ï¼å¯ä»¥ä½¿ç¨å®ä»¬ã
LIST OF FUNCTIONS å½æ°å表
Function å½æ°
Description æè¿°
|
clearerr |
æ£æµå¹¶éç½®æµç¶æ |
|||
|
fclose |
å³éæµ |
|||
|
fdopen |
æå¼æµ |
|||
|
feof |
æ£æµå¹¶éç½®æµç¶æ |
|||
|
ferror |
æ£æµå¹¶éç½®æµç¶æ |
|||
|
fflush |
å·æ°æµ |
|||
|
fgetc |
ä»è¾å¥æµä¸è·åä¸ä¸ä¸ªå符æè¯ |
|||
|
fgetpos |
éå®ä½æµ |
|||
|
fgets |
ä»æµä¸è·åä¸è¡ |
|||
|
fileno |
è¿åæµåæ°çæ´æ°å½¢å¼çæ述符 |
|||
|
fopen |
æå¼æµ |
|||
|
fprintf |
æç§æ ¼å¼è¾åºå¸¸è§å容 |
|||
|
fpurge |
å·æ°æµ |
|||
|
fputc |
åæµè¾åºä¸ä¸ªå符æè¯ |
|||
|
fputs |
åæµè¾åºä¸è¡ |
|||
|
fread |
äºè¿å¶è¾å¥/è¾åº |
|||
|
freopen |
æå¼æµ |
|||
|
fropen |
æå¼æµ |
|||
|
fscanf |
æç§æ ¼å¼è¾å¥å¸¸è§å容 |
|||
|
fseek |
éå®ä½æµ |
|||
|
fsetpos |
éå®ä½æµ |
|||
|
ftell |
éå®ä½æµ |
|||
|
fwrite |
äºè¿å¶è¾å¥/è¾åº |
|||
|
getc |
ä»è¾å¥æµä¸è·åä¸ä¸ä¸ªå符æè¯ |
|||
|
getchar |
ä»è¾å¥æµä¸è·åä¸ä¸ä¸ªå符æè¯ |
|||
|
gets |
ä»æµä¸è·åä¸è¡ |
|||
|
getw |
ä»è¾å¥æµä¸è·åä¸ä¸ä¸ªå符æè¯ |
|||
|
mktemp |
å建 (å¯ä¸ç) 临æ¶æ件å |
|||
|
perror |
ç³»ç»é误æ¶æ¯ |
|||
|
printf |
æç§æ ¼å¼è¾åºå¸¸è§å容 |
|||
|
putc |
åæµè¾åºä¸ä¸ªå符æè¯ |
|||
|
putchar |
åæµè¾åºä¸ä¸ªå符æè¯ |
|||
|
puts |
åæµè¾åºä¸è¡ |
|||
|
putw |
åæµè¾åºä¸ä¸ªå符æè¯ |
|||
|
remove |
å é¤ç®å½é¡¹ |
|||
|
rewind |
éå®ä½æµ |
|||
|
scanf |
æç§æ ¼å¼è¾å¥å¸¸è§å容 |
|||
|
setbuf |
æµç¼å²æä½ |
|||
|
setbuffer |
æµç¼å²æä½ |
setlinebuf
æµç¼å²æä½
|
setvbuf |
æµç¼å²æä½ |
|||
|
sprintf |
æç§æ ¼å¼è¾åºå¸¸è§å容 |
|||
|
sscanf |
æç§æ ¼å¼è¾å¥å¸¸è§å容 |
|||
|
strerror |
ç³»ç»é误æ¶æ¯ |
sys_errlist
ç³»ç»é误æ¶æ¯
|
sys_nerr |
ç³»ç»é误æ¶æ¯ |
|||
|
tempnam |
临æ¶æ件æ§å¶ |
|||
|
tmpfile |
临æ¶æ件æ§å¶ |
|||
|
tmpnam |
临æ¶æ件æ§å¶ |
|||
|
ungetc |
åè¾å¥æµä¸éåå符 |
|||
|
vfprintf |
æç§æ ¼å¼è¾åºå¸¸è§å容 |
|||
|
vfscanf |
æç§æ ¼å¼è¾å¥å¸¸è§å容 |
|||
|
vprintf |
æç§æ ¼å¼è¾åºå¸¸è§å容 |
|||
|
vscanf |
æç§æ ¼å¼è¾å¥å¸¸è§å容 |
|||
|
vsprintf |
æç§æ ¼å¼è¾åºå¸¸è§å容 |
|||
|
vsscanf |
æç§æ ¼å¼è¾å¥å¸¸è§å容 |
CONFORMING TO æ ååè
å½æ°åº stdio éµå¾ª ANSI X3.159-1989 (‘‘ANSI C’’) æ åã
SEE ALSO åè§
open(2), close(2), read(2), write(2), stdout(3)
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