可以随机从文件中实现添加好的人员名单中
随机抽出一个,并可以保留上次抽中的人员姓名-Can be achieved from a file, add a random list of persons randomly selected a good one, and can retain the last names of persons drawn
郭克强老师视屏教程,第一课第二部分,手机应用程序结构,适合初学者-Shiping Guo Keqiang teacher tutorials, the first lesson the second part, cell phone use program structure, suitable for beginners