通过上机实现拉格朗日、牛顿和三次自然样条三种插值算法，了解并掌握拉格朗日、牛顿和三次自然样条三种插值算法的内涵。通过动态演示曲线生成全过程，分析并比较三种插值算法的优缺点，深刻理解这些算法。-Lagrange, Newton-on and three natural spline the three interpolation algorithm, to understand and grasp the meaning of Lagrange, Newton, and three natural