在网上找了许多龙格库塔的算法，但是没一个满意的，所以就自己改进这了这个程序，这是用C++写的，而且里面有一个具体的实例，欢迎学习和探讨。-Internet is a lot of Runge-Kutta algorithm, but not a satisfactory, so we own it this improved procedure, which is written in C++, and there were a con