如何向生成终端输出(在Linux中)的c++程序添加一个固定的进度条?

I have an existing program that contains a loop over files. It does various things, providing lots of terminal output. I want to have an overall progress bar that remains stationary on the same line at the bottom of the terminal while all of the output from the file operations is printed above it. How should I try to do something like this?I have an existing program that contains a loop