写一个程序，用户依照流行歌曲的人气调查表，将相关数据输入到计算机文件中，计算机按照人气指数将排名前十位的歌曲信息显示并存储到文件中。-Write a program, the user in accordance with the popularity of pop music questionnaire, data will be entered into the computer files, the computer will be ranked according to populari

用勒让德伪谱法，求解最优控制问题的DIDO工具箱。demo版本。license需要在其网站上填一个调查问卷-Legendre pseudospectral method for solving the optimal control problem DIDO toolbox. The demo version. license need to fill in a questionnaire on its website