@node memcmp, memory
@subheading Syntax

@example
#include <string.h>

int memcmp(const void *s1, const void *s2, size_t num);
@end example

@subheading Description

This function compares two regions of memory, at @var{s1} and @var{s2},
for @var{num} bytes. 

@subheading Return Value

@table @asis

@item zero

s1 == s2

@item positive

s1 > s2

@item negative

s1 < s2

@end table


@subheading Portability

@portability ansi, posix