Console overwriting like top

Question

Ok so I was just wondering how console applications like top(1) for linux overwrite multiple lines. I want to know how to do it for C++ or C. I know how to overwrite 1 line by just putting a \\r but I wanted to know how to do so for multiple lines, again like in top or if its even possible.

Answer 1

They use terminal escape sequences to move the cursor around the screen. A few even use direct framebuffer access, to treat the screen as an array of characters which can be directly indexed.

The curses (or ncurses ) library is a good abstraction layer.

Answer 2

这可能无法直接解决问题，但是这种情况取决于终端，通常通过curses实现来完成（ ncurses是使用最广泛的）。