这是一个基于ChatGPT的API的命令行聊天程序，支持连续回答与发起新对话，并且优化了用户界面，代码添加了注释
This is a command-line chat program based on the ChatGPT API, which supports continuous responses and initiating new conversations, and has optimized user interface with added comments to the code.
支持连续对话和非连续对话，每个新对话会用分界线划分开
注：使用ChatGPT API有时需要科学上网