Let's try building and running the project to check whether the building environment is configured properly. To build the project, click on the hammer icon (Build) at the bottom of the left panel. At the right of the bottom panel, a grey progress bar will appear to indicate the build progress. When the build finishes, the progress bar turns green if the build was successful or red otherwise. After the application was built, click on the green triangle icon to run the project.
Qt Creator can automatically save all files and build the project before running it, so you can just hit the Run (Ctrl + R) or Start Debugging (F5) button after making changes to the project. To verify that ...
