strcmp, strncmp - compare two strings
#include <string.h>
int strcmp(const char *s1, const char *s2);
int strncmp(const char *s1, const char *s2, size_t n);
The
strcmp() function compares the two strings
s1 and
s2.
The locale is not taken into account (for a locale-aware comparison, see
strcoll(3)). It returns an integer less than, equal to, or greater than
zero if
s1 is found, respectively, to be less than, to match, or be
greater than
s2.
The
strncmp() function is similar, except it compares only the first (at
most)
n bytes of
s1 and
s2.
The
strcmp() and
strncmp() functions return an integer less than,
equal to, or greater than zero if
s1 (or the first
n bytes
thereof) is found, respectively, to be less than, to match, or be greater than
s2.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| strcmp (), strncmp () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
bcmp(3),
memcmp(3),
strcasecmp(3),
strcoll(3),
string(3),
strncasecmp(3),
strverscmp(3),
wcscmp(3),
wcsncmp(3)