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INDEX(3) BSD Library Functions Manual INDEX(3) NAME index, rindex -- locate character in string LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <strings.h> char * index(const char *s, int c); char * rindex(const char *s, int c); DESCRIPTION The index() function locates the first occurrence of c (converted to a char) in the string pointed to by s. The terminating null character is considered to be part of the string; therefore, if c is `\0', the func-tions functions tions locate the terminating `\0'. The rindex() function is identical to index(), except that it locates the last occurrence of c. RETURN VALUES The functions index() and rindex() return a pointer to the located char-acter, character, acter, or NULL if the character does not appear in the string. SEE ALSO memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3) HISTORY The index() and rindex() functions appeared in Version 6 AT&T UNIX. Their prototypes existed previously in <string.h> before they were moved to <strings.h> for IEEE Std 1003.1-2001 (``POSIX.1'') compliance. BSD June 4, 1993 BSD |