选择是否创建一个.txt文档，若文件为空，则要求输入内容，若文件不为空，则每运行一次，都自动复制原文件内容，并加入文件中。-Choose whether or not to create a. Txt file, if file is empty, they are required to enter the content, if the file is not empty, each run once, automatically copying the contents of the or