Re: Templates: Type-dependent constants
On May 8, 4:02 pm, Rune Allnor <all...@tele.ntnu.no> wrote:
Hi all.
I am working with a class which applies numerical algorithms
to numbers of type either 'float' or 'double'. In such applications
one needs to handle various type-dependent constants, like
minimum/maximum values, numerical accuracy for answers
after computations, etc. For the type 'float', the relative
accuracy is one the order 1e-8, for 'double' it is on the order
1e-15.
How can I design a template class which handles these
sorts of type-dependent constants seamlessly?
The idea is described as:
///////////////////////////////////////////////////////////////////////
template <typedef T>
class Data {
private:
T accoracty;
public:
Data();
};
Data::Data<T>()
{
if (T == float) accuracy = 1e-8;
if (T == double) accuracy = 1e-15;
}
Hi Rune,
#include <iostream>
using namespace std;
template <typename X> inline static const double accuracy ();
template <> inline static const double accuracy<float >() {return
1e-8 ;}
template <> inline static const double accuracy<double>() {return
1e-15 ;}
int main ()
{
cout << "The accuracy for float is " << accuracy<float>() << endl;
cout << "The accuracy for double is " << accuracy<double>() << endl;
return 0;
}
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