int task5(){
    Point pointOne(1,4);
    Point pointTwo(5,3);
    Point pointThree(2,2);
    TextWindow tW;
    Point testPoints[3]={pointOne, pointTwo, pointThree};
    Point resultPoint = averagePoint(testPoints, 3);
    printPoint(tW, resultPoint);
    return 0;
}

Point averagePoint(Point points[], int length){
    double resultX;
    double resultY;
    double x;
    double y;
    for(int i=0; i <= length; i++){
        resultX+= (points[i]).getX;
        resultY+= (points[i]).getY;

    }
    x = resultX/length;
    y = resultY/length;

    Point middlePoint(x,y);
    return middlePoint;

}

F:\SkolaDMP\objektOrienteradMjukvaruUtveckling\labb1\labb001\main.cpp:72: error: could not convert '(ShapeLib::Point*)(& testPoints)' from 'ShapeLib::Point*' to 'ShapeLib::Point'
     Point resultPoint = averagePoint(testPoints, 3);
                                                   ^