text: //
  //  RungeKutta.hpp
  //  runge_kutta
  //
  //  Created by NAMBU AKIFUMI on 2015/12/14.
  //
  //
  
  #ifndef RungeKutta_hpp
  #define RungeKutta_hpp
  
  #include <stdio.h>
  
  class RungeKutta {
      float * result;
      int num;
      void calculateNextStep(float (*f[])(float t, float *x), float t0, float *x, float tn, int num);
      
  public:
      RungeKutta(){};
      RungeKutta(float (*f[])(float t, float *x), float t0, float tn, float *x, int div, int num);
      float getValue(int step, int index);
  };
  
  #endif /* RungeKutta_hpp */
  