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April 26, 2012 05:50
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,41 @@ /* * fizzbuzz.cpp * * Created on: Apr 25, 2012 * Author: Brian Geffon * * fizzbuzz solved without looping or conditionals using only template recursion. */ #include <iostream> #include <string> template <int r> struct FizzBuzzPrinter { static const int fizzBuzzed = 0; template <typename T> FizzBuzzPrinter(T t) {} }; template <> struct FizzBuzzPrinter<0> { static const int fizzBuzzed = 1; template <typename T> FizzBuzzPrinter(T t) { std::cout << t; } }; template <int N> struct FizzBuzz: FizzBuzz<N - 1> { FizzBuzz() { FizzBuzzPrinter<(N % 15)>("FizzBuzz"); FizzBuzzPrinter<(N % 5) + FizzBuzzPrinter<N % 15>::fizzBuzzed>("Buzz"); FizzBuzzPrinter<(N % 3) + FizzBuzzPrinter<(N % 15)>::fizzBuzzed + FizzBuzzPrinter<(N % 5) + FizzBuzzPrinter<N % 15>::fizzBuzzed>::fizzBuzzed>("Fizz"); FizzBuzzPrinter<FizzBuzzPrinter<N % 3>::fizzBuzzed + FizzBuzzPrinter<N % 5>::fizzBuzzed>(int(N)); std::cout << std::endl; } }; template <> struct FizzBuzz<0> {}; int main (int argc, char **argv) { FizzBuzz<100> p; return 0; }