BestRationalApproximation.h

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/* This file is part of MoDELib, the Mechanics Of Defects Evolution Library.
 *
 *
 * MoDELib is distributed without any warranty under the
 * GNU General Public License (GPL) v2 <http://www.gnu.org/licenses/>.
 */
 
#ifndef model_BESTRATIONALAPPROXIMATION_H_
#define model_BESTRATIONALAPPROXIMATION_H_
 
 
// https://rosettacode.org/wiki/Convert_decimal_number_to_rational#C
 
#include <cstdint>
#include <utility>
 
namespace model
{
 
    class BestRationalApproximation
    {
      public:
        typedef int64_t LongIntType;
 
      private:
        static std::pair<LongIntType, LongIntType> rat_approx(double f, LongIntType md);
 
        const std::pair<LongIntType, LongIntType> intPair;
 
      public:
        const LongIntType &num;
        const LongIntType &den;
 
        BestRationalApproximation(const double &f, const LongIntType &md);
    };
 
} // namespace model
#endif