一个很好的飞机定票系统。。包括一套完整的定票，退票，查找，是否有余票等等操作，给初学者课程设计很好的帮手。此程序并不完善，还请各位高手指出。-a good set of aircraft counting system. . Includes a complete set, with a refund for you, whether operating surplus votes, etc., to the beginners course design good helper. This procedure is not perfect, you also requested that the master.