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memcmp(3) [freebsd man page]

MEMCMP(3)						   BSD Library Functions Manual 						 MEMCMP(3)

NAME
memcmp -- compare byte string LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <string.h> int memcmp(const void *b1, const void *b2, size_t len); DESCRIPTION
The memcmp() function compares byte string b1 against byte string b2. Both strings are assumed to be len bytes long. RETURN VALUES
The memcmp() function returns zero if the two strings are identical, otherwise returns the difference between the first two differing bytes (treated as unsigned char values, so that '200' is greater than '', for example). Zero-length strings are always identical. SEE ALSO
bcmp(3), strcasecmp(3), strcmp(3), strcoll(3), strxfrm(3), wmemcmp(3) STANDARDS
The memcmp() function conforms to ISO/IEC 9899:1990 (``ISO C90''). BSD
June 4, 1993 BSD

Check Out this Related Man Page

STRCMP(3)						   BSD 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 null-terminated strings s1 and s2. The strncmp() function compares not more than len characters. Because strncmp() is designed for comparing strings rather than binary data, characters that appear after a '' character are not compared. RETURN VALUES
The strcmp() and strncmp() functions return an integer greater than, equal to, or less than 0, according as 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 ''. SEE ALSO
bcmp(3), memcmp(3), strcasecmp(3), strcoll(3), strxfrm(3), wcscmp(3) STANDARDS
The strcmp() and strncmp() functions conform to ISO/IEC 9899:1990 (``ISO C90''). BSD
October 11, 2001 BSD

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