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STRCMP(3) Library Functions Manual STRCMP(3)

strcmp, strncmp — compare strings

library “libc”

#include <string.h>

int
strcmp(const char *s1, const char *s2);

int
strncmp(const char *s1, const char *s2, size_t len);

The () and strncmp() functions lexicographically compare the null-terminated strings s1 and s2.

The () function compares not more than len characters. Because strncmp() is designed for comparing strings rather than binary data, characters that appear after a ‘\0’ character are not compared.

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 ‘\0’.

memcmp(3), strcasecmp(3), strcoll(3), strxfrm(3), wcscmp(3)

The strcmp() and strncmp() functions conform to ISO/IEC 9899:1990 (“ISO C90”).

October 11, 2001 DragonFly-5.6.1