<![CDATA[Recent Qt Creator: scanf still doesn't work]]>I am a teacher educating C/C++. For this we use Qt Creator under Windows (with mingw). We mostly deal with console projects (c and c++, without qt). There is one reason we still stick to an old version 5.11.1 of Qt Creator. In newer versions, as a default, the scanf command does not work. It doesn't wait for the input, it just falls through. The problem is that stdin and stdout are routed to the integrated output window. Only if you check a rather buried option "run in terminal", then it works. The problem is that you have to do this for each project and for each student. It was much better in old versions where it opened a new terminal by default.
As I have tried the most recent stable version today, and the problem still remains: Is there a solution to this problem that works globally (e.g. a config file)?

Best regards
Johannes

]]>https://forum.qt.io/topic/158570/recent-qt-creator-scanf-still-doesn-t-workRSS for NodeSat, 18 Apr 2026 00:06:57 GMTThu, 05 Sep 2024 14:49:35 GMT60<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Tue, 03 Mar 2026 06:11:56 GMT]]>@Taupter Have you selected Project > Run Settings > Run in Terminal? That is a per-project setting.

Regards

]]>https://forum.qt.io/post/836727https://forum.qt.io/post/836727Tue, 03 Mar 2026 06:11:56 GMT<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Mon, 02 Mar 2026 23:59:18 GMT]]>@aha_1980 as of Qt Creator 18.0.2, the Preferences > Terminal > "Use internal terminal" checkbox is ignored. No matter how it is selected, the code is run in "Application Output" window.
Tested on Windows and macOS.

]]>https://forum.qt.io/post/836723https://forum.qt.io/post/836723Mon, 02 Mar 2026 23:59:18 GMT<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Tue, 24 Sep 2024 09:34:05 GMT]]>@aha_1980 Thanks very much, that indeed was it. I didn't see the Terminal option, because you have to scroll down for it to appear.

]]>https://forum.qt.io/post/810466https://forum.qt.io/post/810466Tue, 24 Sep 2024 09:34:05 GMT<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Tue, 10 Sep 2024 11:05:45 GMT]]>@sw_johannes Did you try adding CONFIG += cmdline to your .pro file?

]]>https://forum.qt.io/post/809164https://forum.qt.io/post/809164Tue, 10 Sep 2024 11:05:45 GMT<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Mon, 09 Sep 2024 19:29:05 GMT]]>@sw_johannes Have you tried unchecking Edit > Preferences > Terminal > "Use internal terminal"?

That should always open an external terminal window whenever running a console application.

And if you have a minimal example that does not work with the internal terminal (from you description, it sounds like that) I would also suggest to report the problem to bugreports.qt.io (and please provide a link to the report here, thanks).

]]>https://forum.qt.io/post/809111https://forum.qt.io/post/809111Mon, 09 Sep 2024 19:29:05 GMT<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Mon, 09 Sep 2024 10:16:14 GMT]]>@VRonin qmake

]]>https://forum.qt.io/post/809050https://forum.qt.io/post/809050Mon, 09 Sep 2024 10:16:14 GMT<![CDATA[Reply to Recent Qt Creator: scanf still doesn't work on Thu, 05 Sep 2024 15:01:30 GMT]]>What build system do you use? qmake or CMake?

]]>https://forum.qt.io/post/808816https://forum.qt.io/post/808816Thu, 05 Sep 2024 15:01:30 GMT