三次样条插值程序。编译运行本程序后，程序会弹出窗口及问句：“input the number of intervals:”，输入插值的次数即可，程序将得到的次数保存在变量int n中。如果输入的插值次数正确（n>=2），程序会显示下一语句：\"input the value of the variable:\"，此时输入插值点即可，程序将得到的插值点保存在变量double v中。若插值点正确（v>=0&&v<=6）,则程序将输出插值结果。-cubic spline interpolation procedure. Compiling the operation procedures, the program will pop-up window and query : "input the number of intervals :", the number of imported interpolation can be. procedures will be stored in the number int n variables. If the input frequency correct interpolation (n