QT Bar Chart/Graph for QT Commercial 5.6 - c++

Question

I am re-engineering an aspect of current existing software in C++ that uses Qt 5.6. I am trying to create a bar chart that can represent the data stored in a table of int(s).
I used the Qt example in my code for a bar chart:
Includes:
#include <QChart>
#include <QBarSet>
#include <QBarSeries>
I attempted to put the includes in the .cpp file however for some reason the classes were not recognized unless they were forward declared so I moved the includes to the header file such that:
#include <QChart>
#include <QBarSet>
#include <QBarSeries>
class QChart;
class QBarSet;
class QBarSeries;
Code:
QBarSet *mainSet = new QBarSet("Data");
.
.
.
(I'll leave the rest of the code out since it really isn't important for the answer)
With the above code (new QBarSet("Data")) QBarSet is underlined in red in visual studio stating "incomplete type is not allowed".
I figure the issue is due to the fact I am trying to use Qt 5.6 for the graphs so I refereed to their website.
From Qt's Qt Charts 2.1.0 website:
In Qt 5.6 release the module binaries will still be available only
with the commercial packages.
That is where I am stuck.
Anyone know my issue or how I can get Qt bar charts for qt 5.6 (if possible)?

Answer 1

Found this resource:
https://doc.qt.io/qt-5/qtcharts-index.html
Stupid mistake, I was importing the wrong files. I removed all the includes that I had in my header file and put the following and it worked fine.
Header:
#include <QtCharts>
using namespace QtCharts;
Source:
QBarSet *mainSet = new QBarSet("Data");
.
.
.