STRCMP(3) |
Library Functions Manual |
STRCMP(3) |
NAME
strcmp, strncmp — compare strings
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
int
strcmp(const char *s1, const char *s2);
int
strncmp(const char *s1, const char *s2, size_t len);
DESCRIPTION
The strcmp() and strncmp() functions lexicographically compare the nul-terminated strings s1 and s2.
RETURN VALUES
The
strcmp() and
strncmp() return an integer greater than, equal to, or less than 0, according to whether the string
s1 is greater than, equal to, or less than the string
s2. The comparison is done using unsigned characters, so that ‘
\200
' is greater than ‘
\0
'.
The strncmp() compares not more than len characters.
STANDARDS
The strcmp() and strncmp() functions conform to ANSI X3.159-1989 (“ANSI C89”).
NOTES
If len is zero strncmp() returns always 0.