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 some time to get this Oh, Oh. I h