C - memcmp function

Synopsis:
#include <stdio.h>
int memcmp(const void* cs, const void* ct, int n);
Description:
The memcmp function compares the first n bytes from cs and ct and returns a value indicating their relationship as follows:
Return Value
if Return value if < 0 then it indicates cs less than ct
if Return value if > 0 then it indicates ct is less than cs
if Return value if = 0 then it indicates cs is equal to ct
Example
#include <stdio.h>
int main()
{
  char hexchars [] = "0123456789ABCDEF";
  char hexchars2 [] = "0123456789abcdef";
  char i;
  i = memcmp (hexchars, hexchars2, 16);
  if (i < 0)
    printf ("hexchars < hexchars2\n");
  else if (i > 0)
    printf ("hexchars >  hexchars2\n");
  else
    printf ("hexchars == hexchars2\n");
  return 0;
}
It will proiduce following result:
hexchars < hexchars2