On Monday, 22 April 2019 at 20:45:54 UTC, Andre Pany wrote:
The code from the example does not work, writeln is never executed.
For "%s" with a string argument, it reads ALL of stdin into that string. This means you need to send an end-of-file indicator to the program. ctrl+z on Windows does this, and ctrl+d can on Linux (you might have to hit it twice there; it doesn't technically send end of file, but can be read as it by the program if there is no other input pending in the buffer).
This is quite bizarre for new users, I agree, but it isn't technically invalid.
(my personal feeling though is readf is just a pile of confusion and should almost never be used. I hate that it is introduced so early in most tutorials... I'd rather have it in an appendix for special cases only rather than like page 3.)
