OOP in C++ newbie [closed] - c++

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I'm a newcomer in C++ OOP and I try to do assignment from my prof.
The prof asked me to create a program that prompt the users to input the number of vertex of a polygon and also its vertices in 2D. That's all.
For example:
Number of points: 3
Enter vertex 1 coordinate: 1 1
Enter vertex 2 coordinate: 1 2
...
I have tried to create 5 files: Point2D.cpp; Point2D.h; Polygon.cpp; Polygon.h and main.cpp
Point2D.cpp
#include "Point2D.h"
#include <iostream>
using namespace std;
Point2D::Point2D(float newX, float newY) {
cout << "calling float type" << endl;
}
void Point2D::setX(float val) {
x = val;
}
float Point2D::getX() {
return x;
}
void Point2D::setY(float val) {
y = val;
}
float Point2D::getX() {
return y;
}
Point2D.h
#pragma once
class Point2D {
private:
float x, y;
public:
// constructor with parameter + default
Point2D(float newX = 0, float newY = 0);
void setX(float val);
float getX();
void setY(float val);
float getY();
};
Polygon.cpp
#include "Polygon.h"
#include <iostream>
Polygon::Polygon() {
verticesCount = 0;
verticesList = NULL;
}
Polygon::Polygon(int vCount) {
if (vCount > 0) {
verticesCount = vCount;
// allocate memory for verticesList
if (verticesList != NULL)
delete[] verticesList;
verticesList = new Point2D[verticesCount];
}
}
Point2D Polygon::getVertex(int index) {
if (verticesCount <= 0) {
return NULL;
} if (verticesList = NULL) {
return NULL;
} if (index >= verticesCount) {
return NULL;
}
return verticesList[index];
}
Polygon::~Polygon() {
}
Polygon.h
#pragma once
#include "Point2D.h"
class Polygon {
private:
Point2D* verticesList;
int verticesCount;
public:
Polygon();
Polygon(int vCount);
~Polygon();
Point2D getVertex(int index);
void addPoint(Point2D p);
};
main.cpp
#include <iostream>
#include "Point2D.h"
#include "Polygon.h"
using namespace std;
int main() {
// using default constructor
Point2D p = Point2D();
return 0;
}
I want to ask from you guys that if my code is correct or not. And what should I do next from there?
Thanks in advance!