On 12/22/05, James Edward G. II removed_email_address@domain.invalid wrote:

I’m trying to understand the argument to BigDecimal#sqrt. I figured

it was for precision and it does seem to affect it, but I can’t

understand the exactly relationship. Can anyone tell me what the

argument controls and how?

This is the C source, if you haven’t looked at it yet.

BigDecimal_sqrt(VALUE self, VALUE nFig)

{

ENTER(5);

Real *c, *a;

S_INT mx, n;

```
GUARD_OBJ(a,GetVpValue(self,1));
mx = a->Prec *(VpBaseFig() + 1);
n = GetPositiveInt(nFig) + VpDblFig() + 1;
if(mx <= n) mx = n;
GUARD_OBJ(c,VpCreateRbObject(mx, "0"));
VpSqrt(c, a);
return ToValue(c);
```

}

I don’t fully understand what’s going on with it, because my C is

pretty weak, but hopefully this will provide some insight from

someone.