On Wed, Apr 14, 2010 at 1:22 PM, vikrant singh <[email protected]>wrote:
> there is a problem to find first K digits of no. N^N , where N can be as > large as 10^9. > so, the algo goes like, > take fractional part(f) of Nlog10(N). > and temp=pow(10,f), > result =(long )10^k * temp. > > I want to assure myself that f has enough fractional part precision so that > at most first 9 digits can be correctly found. > > I more doubt , does the maximum value of any type assures that it can hold > all intermediate value. > my ques is the maximum number of digits after decimal a type can hold. > > Can any1 clear my doubt related to long double that i initially asked. > Help appreciated. > > > *Apologies for any stupidity. > > On Wed, Apr 14, 2010 at 6:31 AM, sharad kumar <[email protected]>wrote: > >> Do u have to use only C++ ,cant u use scripting languages like >> Python....where precision is very good in Python..esp wen u use Si-Py.... >> >> >> On Tue, Apr 13, 2010 at 10:10 PM, Himanshu Aggarwal < >> [email protected]> wrote: >> >>> I think it should depend on the underlying architecture, on how it stores >>> the floating data types >>> >>> In case floats and double are implemented using IEEE 754, then floats >>> have 8 bits for precision and double have 11 bits for precision. Normally >>> the exponents are biased, which means that for float it ranges from 2^(-127) >>> to 2^(+ 127) and for double it ranges from 2^(-1024) to 2^(+1024). >>> >>> ~Himanshu Aggarwal >>> >>> On Tue, Apr 13, 2010 at 6:10 AM, Anil C R <[email protected]> wrote: >>> >>>> correct me if I'm wrong but, float has a precision of around 8 digits. >>>> and double 16 digits... if you want arbitrary precision floating point >>>> numbers, try GNU BigNum library... >>>> Anil >>>> >>>> >>>> On Mon, Apr 12, 2010 at 9:54 PM, Himanshu Aggarwal < >>>> [email protected]> wrote: >>>> >>>>> >>>>> >>>>> On Sun, Apr 11, 2010 at 6:55 PM, GentLeBoY >>>>> <[email protected]>wrote: >>>>> >>>>>> how to store fractional numbers with a fractional part having 25-30 >>>>>> digits after decimal place, >>>>>> does long double has the same precision as double?. >>>>>> 1 more prob. >>>>>> format specifier for long double is %lf and same for double, so if i >>>>>> write >>>>>> long double a; >>>>>> scanf("%lf",&a); >>>>>> a=a*2; >>>>>> printf("%lf",a); >>>>>> why is the output -2.0000 ? >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Algorithm Geeks" group. >>>>>> To post to this group, send email to [email protected]. >>>>>> To unsubscribe from this group, send email to >>>>>> [email protected]<algogeeks%[email protected]> >>>>>> . >>>>>> For more options, visit this group at >>>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>>> >>>>>> >>>>> >>>>> Float has single precision. >>>>> double has double precision. >>>>> Long double has extended precision. >>>>> >>>>> For your requirement, even a float would suffice. check out the value >>>>> of FLT_MAX . It is of the order of 10^37. >>>>> >>>>> ~Himanshu Aggarwal >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Algorithm Geeks" group. >>>>> To post to this group, send email to [email protected]. >>>>> To unsubscribe from this group, send email to >>>>> [email protected]<algogeeks%[email protected]> >>>>> . >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Algorithm Geeks" group. >>>> To post to this group, send email to [email protected]. >>>> To unsubscribe from this group, send email to >>>> [email protected]<algogeeks%[email protected]> >>>> . >>>> For more options, visit this group at >>>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Algorithm Geeks" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]<algogeeks%[email protected]> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Algorithm Geeks" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<algogeeks%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > Vikrant Singh > -- Vikrant Singh -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
