int strcmp(const char *, const char *) __ATTR_PURE__
The strcmp() function compares the two strings
s1
and s2
.
The strcmp() function returns an integer less than, equal to,
or greater than zero if s1
is found, respectively,
to be less than, to match, or be greater than s2
. A
consequence of the ordering used by strcmp() is that if s1
is an initial
substring of s2
, then
s1
is considered to be "less than"
s2
.