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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.

COMPLIANCE
strcmp is ANSI C.

strcmp requires no supporting OS subroutines.