拉个朗日插值公式是把Pn（X）的构造问题转化为n+1插值基函数问题的构造！此软件就是拉哥郎日插值的原程序VB版-Rafah Colon Day interpolation formula is Pn (X) issue of the structure into an n-interpolation function of the structure! This software suite is Lang interpolating the original version of VB pro