Unknown Memory Leak(?) While using pointer

Question

#include <iostream>
using namespace std;
class Point {
private:
    int x;
    int y;
    static int numCreatedObjects;
public:
    Point() : x(0), y(0) {
        numCreatedObjects++;
    }

    Point(int _x, int _y) : x(_x), y(_y) {}
    ~Point() {
        cout << "Destructed..." << endl;
    }
    void setXY(int _x, int _y) {
    
        this->x = _x;
        this->y = _y;
    }

到目前为止似乎编译得很好。检查构造函数和析构函数，直到它们完全可操作。

    int getX() const { return x; }
    int getY() const { return y; }
    // *this + pt2 -> 
    Point operator+(Point& pt2) {
        Point result(this->x + pt2.getX(), this->y + pt2.getY());
        return result;
    }
    //operator overloading
    Point& operator=(Point& pt) {
        this->x = pt.x;
        this->y = pt.y;
        return *this;
    }
    static int getNumCreatedObject() {
        return numCreatedObjects; }
    friend void print(const Point& pt);
    friend ostream& operator<<(ostream& cout, Point& pt);
    friend class SpyPoint;
};

SpyPoint 类上的 hack_all_info 函数必须这样做 将 Point pt x, y 更改为 40, 60. 并且 static int 必须更改为 10.

所以我这样编译；

//static (numCreatedObjects)
int Point::numCreatedObjects = 0;

void print(const Point& pt) {
    cout << pt.x << ", " << pt.y << endl;
}

ostream& operator<<(ostream& cout, Point& pt) {
    cout << pt.x << ", " << pt.y << endl;
    return cout;

}
class SpyPoint {
public:
    
    void hack_all_info(Point &pt) {
        pt.x = 40;
        pt.y = 60;

        cout << "Hacked by SpyPoint" << endl << "x:" << pt.x << endl << "y: " << pt.y << endl;
        cout << "numCreatedObj.: " << pt.numCreatedObjects << endl;

    }
};
int main() {
    Point pt1(1, 2);
    cout << "pt1 : ";
    print(pt1);
    cout << endl;
    Point* pPt1 = &pt1;
    
    cout << "pt1 : ";
    cout << pPt1->getX() <<", "<< pPt1->getY() << endl;
    cout << "pt1 : ";

    Point* pPt2 = new Point(10, 20);
    cout << endl;
    cout << "pt2 : ";
    cout << pPt2->getX() << ", " << pPt2->getY() << endl;
    cout << endl;
    delete pPt1;
    delete pPt2;
    cout << "pt1 NumCreatedObject : ";
    cout <<  Point::getNumCreatedObject() << endl;

    Point pt2(10, 20);
    Point pt3(30, 40);
    Point pt4 = pt2 + pt3;
    cout << "pt1 NumCreatedObject : ";
    cout << Point::getNumCreatedObject() << endl << endl;
    // object array
    Point* ptAry = new Point[5];
    cout << "pt2 NumCreatedObject : ";
    cout << Point::getNumCreatedObject() << endl;
    cout << endl;

    delete[] ptAry;
    cout << endl;
    // friend class
    SpyPoint spy;
    cout << "pt1 info" << endl;
    spy.hack_all_info(pt1);
    cout << "pt4 info" << endl;
    spy.hack_all_info(pt4);
    return 0;
}

从这里编译没有问题，但是执行时出错
但是我不知道指针错在哪里:(