随机数问题，虽然是随即，但同时还要保证每次数都不相同，因为随即也可能会相同的嘛。花了一定的时间弄这个哦，呵呵。希望能给大家一点点帮助。-Random numbers, although it is immediately, but at the same time to ensure that each number is different, because then it might do the same. It took som