用VB实现四阶龙格库塔法的程序，这个程序很好的完成了其算法的精髓-Using VB to achieve fourth-order Runge-Kutta method of procedure, this procedure done well the essence of the algorithm

用四阶龙格库塔法解决常微分方程边值问题，具体来说就是打靶问题-The fourth-order Runge-Kutta method to solve ordinary differential equations, specifically targeting the problem

比较矩形，梯形，和四阶龙格库塔法积分程序-Comparison of rectangular, trapezoidal, and fourth-order Runge-Kutta method integration program