工程中很多的地方用到龙格库塔求解微分方程的数值解，龙格库塔是很重要的一种方法，尤其是四阶的，精确度相当的高。 -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.