%Qf in gmp_printf (was: Re: Wrong division ?)

[paul zimmermann]

       Pedro,

> mpz_t div = num / den
> mpz_t rem = num % den
> print(div)
> print(".")
> do (decimals) times:
>    div = rem * 10 / den
>    rem = rem * 10 % den
>    print(div)

isn't the code below more efficient?

mpz_t div = (num * 10^decimals) / den
str = out (div)
print head (str, len(str) - decimals)
print "."
print tail (str, decimals)

Paul