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ATOI
Section: Linux Programmer's Manual (3)Updated: 17 December 2000
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atoi, atol, atoll, atoq - ʸ»úÎó¤òÀ°¿ô·¿¤ËÊÑ´¹¤¹¤ë½ñ¼°
#include <stdlib.h> int atoi(const char *nptr);
long atol(const char *nptr);
long long atoll(const char *nptr);
long long atoq(const char *nptr);
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atoi()´Ø¿ô¤Ï¡¢nptr¤Ë¤è¤Ã¤Æ»Ø¼¨¤µ¤ì¤ëʸ»úÎó¤Î¤Ï¤¸¤á¤ÎÉôʬ¤ò int ·¿À°¿ô¤ËÊÑ´¹¤¹¤ë¡£ ¤³¤Î¿¶¤ëÉñ¤¤¤Ï¡¢ atoi()´Ø¿ô¤¬¥¨¥é¡¼¤ò¸«¤Ä¤±¤Ê¤¤¤³¤È¤ò½ü¤¤¤Æ¤Ï¡¢
- strtol(nptr, (char **)NULL, 10);
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atol() ´Ø¿ô¤È atoll() ´Ø¿ô¤Ï atoi() ¤ÈƱÍͤﶤëÉñ¤¤¤ò¤¹¤ë¤¬¡¢ ʸ»úÎó¤Î¤Ï¤¸¤á¤ÎÉôʬ¤ò¤½¤ì¤¾¤ì long ¤ä long long ¤ËÊÑ´¹¤¹¤ë¡£ atoq() ¤Ï atoll() ¤Î¸Å¤¤Ì¾Á°¤Ç¤¢¤ë¡£
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SVID 3, POSIX.1, BSD 4.3, ISO/IEC 9899¡£ ISO/IEC 9899:1990 (C89) ¤È POSIX.1 (1996 ǯÈÇ) ¤Ë¤Ïatoi() ¤È atol() ¤À¤±¤¬´Þ¤Þ¤ì¤Æ¤¤¤ë¡£ C99 ¤Ç atoll() ¤¬Äɲ䵤줿¡£Ãí°Õ
Èóɸ½à¤Ç¤¢¤ë atoq() ´Ø¿ô¤Ï libc 4.6.27 ¤ä glibc 2 ¤Ë¤Ï´Þ¤Þ¤ì¤Æ¤¤¤Ê¤¤¤¬¡¢ libc5 ¤È libc 4.7 ¤Ë¤Ï¸ºß¤·¤Æ¤¤¤ë(¤¿¤À¤· libc 5.4.44 ¤Þ¤Ç¤Ï <stdlib.h>¤Î¥¤¥ó¥é¥¤¥ó´Ø¿ô¤Î¤ß¤Ç¤¢¤ë)¡£ atoll() ´Ø¿ô¤Ï glibc 2 ¤Î¥Ð¡¼¥¸¥ç¥ó 2.0.2 ¤«¤é¸ºß¤·¤Æ¤¤¤ë¤¬¡¢ libc4 ¤ä libc5 ¤Ë¤Ï¸ºß¤·¤Ê¤¤¡£´ØÏ¢¹àÌÜ
atof(3), strtod(3), strtol(3), strtoul(3)