no member named 'cout' in namespace 'std'

Thomas9258

ive made a simple hello world script:

#include <QCoreApplication>
#include <iostream>

int main()
{   
    std::cout << "hello world" <<std::endl;
    return 0;
}

I get an error in the editor, and not when running the script. the thing is, i dont get why the editor tells me something is wrong, and i dont really know how to fix it, maybe someone else have runned into the same issue?

Edit:
Thanks everyone for helping me!
mrjj's solution: Turning off "clang format" in help > About_Plugins seems to work (in hiding every clang notification thus hiding even the incorrect ones). Im fine with the solution though, they arent useful in my opinion anyway.

mrjj

Hi and welcome to the forums.
Its the clang code model acting up.
Not seen that for cout before !
It normally gives hints/advice about the code.

https://forum.qt.io/topic/100762/qt-creator-clang-code-model-problems-collection

Im not sure why it cant see into std.. That is new.

You can "fix" it by disabling the code model ( see link)
Or just ignore it.

Pl45m4

@Thomas9258

Sometimes it takes some time for it to recognize everything. Try a re-build

sierdzio

I've noticed this on my side, too, at least since Qt Creator 4.13 (and I think it did sporadically happen in 4.12.x, too).

I don't have a workaround. It sometimes works, sometimes it does not.

Kopilov

I had the same problem. This helped:
https://askubuntu.com/questions/1232969/qtcreator-not-recognizing-linked-libraries-after-upgrading-ubuntu-to-20-04
QtCreator 4.11 still relies on clang-8, but on Ubuntu 20.04 apt will install clang-10. Install clang 8

sudo apt install clang-8

JonB

@Kopilov
FWIW, just to confirm to any other readers that I had to do this when I moved to Ubuntu 20.04, it is indeed required.

Skazik

@Kopilov Thank you!! Worked for me fine