"hi" <serverback at 126.com> writes:
    Hi, i have downloaded the whole gmplib 4.2.1 from the link at swox.com.
  Then, i unpack the file. I searched the whole packege, and didnot find the gmp.h file. 
    where to find it? Without it, I cannot use the lib!!!
Without compiling the library, I suspect you also cannot use it.
Hint: compile and look for gmp.h again.
-- 
Torbjörn