How to run a pure c++ program in Qt?

Question

I am new in Qt and tried to start to write a simple pure C++ program in it. I created a new project and my.pro file looks like below:

TEMPLATE = app
TARGET = testgraph
QT = core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
SOURCES += \
main.cpp

and my main.cpp file is:

#include <iostream>

using namespace std;

int main(){
    int n;
    cout << "type an integer: " << endl;
    cin >> n;
    cout << "you have typed: " << n << endl;

    return 0;
}

and then I pressed the Build button and then Run. It seems like the program is working but it could't reach to assigning n the value I had just typed in,

after I typed 4 and pressed Enter, I expected it to break the line and return "you have typed 4" but the cursor just started a new line and nothing happened.

Is this because something wrong in.pro file?

Answer 1

Your .pro file shows that you have created a GUI app but your requirement is to create a pure C++ project.

Follow these steps:

1. Open File menu
2. Select New Project
3. Select Non-Qt Project from the dialog box
4. Select Plain C++ Application from the list on the right

After setting this up, your code should run.

The project wizard will offer to select a build system. If your project is a CMake or makefile project, select accordingly. Otherwise, you can select QMake and it'll generate a makefile for you.