how can i use sin cos etc with gmpxx varibles ?
#hi
sudden musk
sly sage
you cant use sin or cos directly with gmpxx
it works with integers and rationals not floats
if you really need trig just convert the mpf_class to double like this:
double d = x.get_d();
double result = sin(d);
or go with mpfr if you want actual high precision trig functions
sudden musk
or go with mpfr if you want actual high precision trig functions
mpfr alone can provide high accuracy ?
sudden musk
```mpf_class x = 1.23;
double d = x.get_d();
double result = sin(d);
```
accuracy will be gone
sudden musk
or go with mpfr if you want actual high precision trig functions
though i also need large int
sly sage
yeah mpfr gives high precision for floats for big ints use gmp alongside it
inland groveBOT
@sly sage has reached level 1. GG!
sly sage
mpfr is actually built on gmp so they work well together
you won't lose accuracy if you stick to mpfr for all float stuff
sudden musk
you won't lose accuracy if you stick to mpfr for all float stuff
double will make the varible lose some digits
inland groveBOT
@sudden musk has reached level 3. GG!
sly sage
yeah u right exactly double has like 15–17 digits precision max
if you need way more use mpfr_class instead of converting to double
mpfr_class x("number", number);
mpfr_class y = sin(x);
something like that
sudden musk
can i convert gmpxx varible ot mpfr varible and return it ?
sly sage
yea
sudden musk
i need tan (mpq_class *mpf_class )
sudden musk
and return tan to gmpxx , its sad how they dont work togther
sly sage
yeah fr it sucks they don’t work together
but you can return the tan result back to the class
sudden musk
is it hard to rewrite a similar library ?