Under Unix, echoing is left to the OS. The usual OS setting is to echo by characters. I thought plain hugs running in a Windows console window did this too, but haven't checked. It doesn't.
So I'd prefer to have characters echoed as they're typed, but don't know what is the cleanest way to achieve this under WinHugs. There are two solutions:
1) Add it to WinHugs, easy enough, just make the typed character handler also write a character (currently it deliberately blocks it). This won't fix it in command line hugs. 2) Add it to Hugs, on windows platform explicitly do a getchar, putchar. WinHugs would receive this fix automatically because it traps putchar. As for line buffering, this should be something specified by the standard. Lines can be buffered with a unlines . map (reverse . reverse) . lines style construct, and this was how I was taught to use interact with buffering. Neil