fread

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Version: 1996-05-17 (openSuse - 09/10/07)

Section: 3 (Bibliothèques de fonctions)

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fread, fwrite - ¥Ð¥¤¥Ê¥ê¥¹¥È¥ê¡¼¥à¤ÎÆþ½ÐÎÏ

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#include <stdio.h>



size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);



size_t fwrite(const void *ptr, size_t size, size_t nmemb,

              FILE *stream);

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fread() ´Ø¿ô¤Ï stream ¥Ý¥¤¥ó¥¿¤Ç»ØÄꤵ¤ì¤¿¥¹¥È¥ê¡¼¥à¤«¤é nmemb ¸Ä¤Î¥Ç¡¼¥¿¤òÆɤ߹þ¤ß¡¢ ptr ¤ÇÍ¿¤¨¤é¤ì¤¿¾ì½ê¤Ë³ÊǼ¤¹¤ë¡£ ¸Ä¡¹¤Î¥Ç¡¼¥¿¤Ï size ¥Ð¥¤¥È¤ÎŤµ¤ò»ý¤Ä¡£

fwrite() ´Ø¿ô¤Ï ptr ¤Ç»ØÄꤵ¤ì¤¿¾ì½ê¤«¤éÆÀ¤¿ nmemb ¸Ä¤Î¥Ç¡¼¥¿¤ò¡¢ stream ¥Ý¥¤¥ó¥¿¤Ç»ØÄꤵ¤ì¤¿¥¹¥È¥ê¡¼¥à¤Ë½ñ¤­¹þ¤à¡£ ¸Ä¡¹¤Î¥Ç¡¼¥¿¤Ï size ¥Ð¥¤¥È¤ÎŤµ¤ò»ý¤Ä¡£

¤³¤ì¤é¤Î½èÍý¤ò¥í¥Ã¥¯¤»¤º¤Ë¹Ô¤¤¤¿¤¤¤È¤­¤Ï¡¢ unlocked_stdio(3) ¤ò»²¾È¤Î¤³¤È¡£

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fread() ¤È fwrite() ¤ÏÆɤ߽ñ¤­¤ËÀ®¸ù¤·¤¿Í×ÁǤθĿô¤òÊÖ¤¹¡£ ¥¨¥é¡¼¤¬À¸¤¸¤¿¾ì¹ç¤ä¡¢end-of-file(¥Õ¥¡¥¤¥ë¤ÎºÇ¸å)¤Ë㤷¤¿¾ì¹ç¡¢ ÊÖ¤êÃͤϻØÄꤷ¤¿¸Ä¿ô¤è¤ê¤â¾®¤µ¤¤ÃÍ(¤Þ¤¿¤Ï¥¼¥í)¤È¤Ê¤ë¡£

fread() ¤Ï end-of-file ¤È¥¨¥é¡¼¤ò¶èÊ̤·¤Ê¤¤¤Î¤Ç¡¢ ¤É¤Á¤é¤¬À¸¤¸¤¿¤«¤òȽÃǤ¹¤ë¤¿¤á¤Ë¤Ï¡¢ ¸Æ¤Ó½Ð¤·Â¦¤Ç feof(3) ¤È ferror(3) ¤È¤ò»ÈÍѤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£

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C89, POSIX.1-2001.

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read(2), write(2), feof(3), ferror(3), unlocked_stdio(3)