mpf_set_d

[Hee Jung Lee]

hi guys! 

this is probably a really basic question.  but!
when i use mpf_set_d(), how do i make sure that
the copy is "exact"?  for example, suppose my double
value is 0.897959184, i want my mpf_t to be 
0.897959184000000000000000000000 and NOT 
0.897959183999999965841709581582

src
===
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"

int main()
{
	double d;
	mpf_t m;
	
	mpf_set_default_prec(400);
	d = 0.897959184;
	mpf_init(m);
	mpf_set_d(m,d);
	printf("\nd=%.16f", d);
	gmp_printf("\nm=%.*Ffd",20,m);
	mpf_clear(m);
}

output
======
d=0.8979591840000000
m=0.897959183999999965841709581582d