QCoreapplication error on hello world

[Technologist]

Hello_World_2\main.cpp:1: error: QCoreApplication: No such file or directory #include <QCoreApplication>

I tried adding QT=+widgets which has worked in the past.

.pro file

TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += main.cpp
QT     += widgets

include(deployment.pri)
qtcAddDeployment()

main.cpp

#include <QCoreApplication>
#include <iostream>

using namespace std;

int main ()
{

   return 0;
}

[SGaist]

Hi,

Remove CONFIG -= qt

Currently you are trying to use Qt in a non Qt project