strcmp—character string compare #include <string.h>
int strcmp(const char *a, const char *b);
Description
strcmp compares the string at a to
the string at b.
Returns
If *a sorts lexicographically after *b,
strcmp returns a number greater than zero. If the two
strings match, strcmp returns zero. If *a
sorts lexicographically before *b, strcmp returns a
number less than zero.
Portability
strcmp is ANSI C.
strcmp requires no supporting OS subroutines.