5.20 strcmp—character string compare

Synopsis

     #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.