Compiler errors on setter and getter functions in QT - c++

Question

In the midst of making a test program I've come across a problem that has me boggled. I have googled and looked on here and haven't found an answer to the problem so thought I might just ask.
The issue: I get compiler errors on a getter and a setter function I made in QT. Basically I need to be able to set and get a QList object.
What am I overlooking? I think I might be doing something wrong with QList but I can't see what.
SliderArray.h
#ifndef SLIDERARRAY_H
#define SLIDERARRAY_H
#include <QWidget>
#include <QList>
#include <QSlider>
class SliderArray : public QWidget
{
Q_OBJECT
public:
explicit SliderArray(int sliders, QWidget *parent = 0);
~SliderArray();
//getter function for slider data
QList<int> GetSliderData();
//setter function for slider data
void SetSliderData(QList<int>);
private:
QList<int> integerList1; //Qlist Object to hold data
SliderArray.cpp
SliderArray::GetSliderData()
{
return integerList1;
}
SliderArray::SetSliderData(QList<int> datalist)
{
integerList1 = datalist;
}
these are the errors I get when I try to compile:
...\sliderarray.cpp:24: error: prototype for 'intSliderArray::GetSliderData()' does not match any in class 'SliderArray'
SliderArray::GetSliderData()
^
...\sliderarray.h:16: error: candidate is: QList<int> SliderArray::GetSliderData()
QList<int> GetSliderData();
^
...\sliderarray.cpp:29: error: prototype for 'int SliderArray::SetSliderData(QList<int>)' does not match any in class 'SliderArray'
SliderArray::SetSliderData(QList<int> datalist)
^
...\sliderarray.h:19: error: candidate is: void SliderArray::SetSliderData(QList<int>)
void SetSliderData(QList<int>);
^

Answer 1

In your cpp file you should have:
QList<int> SliderArray::GetSliderData()
{
return integerList1;
}
void SliderArray::SetSliderData(QList<int> datalist)
{
integerList1 = datalist;
}
This has nothing to do with Qt, you're just missing the return types.