通过获取Excel中的数据，进行坐标显示，并对该组数据进行三次样条插值，并计算出积分结果。全部为本人所写，希望大家踊跃分享-Through access to data in Excel, display coordinates, and this set of data for the cubic spline interpolation, and calculate the integral result. All I wrote, hope you can come to share! !