Introduction - If you have any usage issues, please Google them yourself
project many places used for Runge- Kutta numerical solution of differential equations. Runge- Kutta is a very important one, especially in four bands, precision is high. This code is only for a demonstration of differential equations, required understanding of the other equation, can be an excuse for its own definition of function, inside were returned to the function : float f (float, float) can be;