c - GMP convert mpz to mpf -

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I am using GMP, and I am using a mpz with a MPF < / Code>. I looked through the library and could not find much. The best thing I could think was: 

  mpz_t x; / * Insert a code here which specifies the value for x * / four buffs [size]; Gmp_sprintf (buf, "% zd", x); Mpf_t y; Mpf_set_str (y, buff);

This solution requires a string and repeated conversion from it. Also, it is limited by SIZE , and I have no way of deciding that large SIZE needs to be done is a better way of converting it ?

mpf_set_z (mpf_set rp, mpz_t op) ?

In addition to this (I think that you have done this) your MPG and MPF variables are mpf_init (mpf_t x) and Mpz_init (mpz_t x) .

Then you will do this: 

  mpz_t x; Mpz_init (x); / * Insert here some values ​​that are x * / mpf_t; Mpf_init (y); Mpf_set_z (y, x);

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