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Mar 29th, 2013
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  1. #include <ctime>
  2. #include <iostream>
  3. #include "mpirxx.h"
  4.  
  5. template<int N> mpz_class fib(mpz_class& tmp)
  6. {
  7.     mpz_class t; tmp = fib<N - 1>(t);
  8.     return tmp + t;
  9. }
  10.  
  11. template<> mpz_class fib<1>(mpz_class& tmp) { tmp = 0; return 1; }
  12. template<> mpz_class fib<2>(mpz_class& tmp) { tmp = 1; return 1; }
  13. template<int N> mpz_class fib() { return fib<N>(mpz_class()); }
  14.  
  15. int main()
  16. {
  17.     clock_t t_start = clock();
  18.     std::cout << fib<1000>() << std::endl;
  19.     printf("Time: %.3fs\n", (float)(clock() - t_start) / 1000);
  20.     return 0;
  21. }
  22.  
  23. /*
  24. Output:
  25. 43466557686937456435688527675040625802564660517371780402481729089536555417949051890403879840079255169295922593080
  26. 322634775209689623239873322471161642996440906533187938298969649928516003704476137795166849228875
  27. Time: 0.001s
  28. */
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