[Dev-C++] templates

[Ioannis V. <no...@ho...>]

I discussed templates with some other coder and here is a cool thing that=
 we
discussed. A nice way of how to make calculations at compile time instead=
 of
run-time. This method uses uses the template ability to pass *constant*
variables as template arguments:=0D
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Check this out:=0D
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#include <iostream>=0D
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template<int N>=0D
struct factorial=0D
{=0D
  static const int value =3D N*factorial<N-1>::value;=0D
};=0D
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template<>=0D
struct factorial<0>=0D
{=0D
  static const int value =3D 1;=0D
};=0D
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int main()=0D
{=0D
 std::cout<<factorial<5>::value<<std::endl;=0D
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}=0D
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I like this thing very much. We can reduce runtime space(recursions) /
time(recursions,iterations) costs elegantly (but increasing compile time)=
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Ioannis Vranos=0D
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* Programming pages: http://www.noicys.freeurl.com=0D
* Alternative URL: http://run.to/noicys=20