почему не работает?

#include <iostream>
using namespace std;
 
class Vector;
 
class point
{
protected:
    float x;
    float y;
    float z;
 
public:
 
    void setX(double coordx) { x = coordx; }
 
    void setY(double coordy) { y = coordy; }
    void setZ(double coordz) { z = coordz; }
 
    double getX() { return x; }
 
    double getY() { return y; }
    double getZ() { return z; }
 
 
    void Point(double coordX, double coordY) {
        setX(coordX);
        setY(coordY);
    }
 
     point operator+(const point other) {
        point temp;
        temp.setX(other.x - x);
        temp.setY(other.y - y);
        temp.setZ(other.z - z);
        return temp;
    }
     friend ostream& operator<<(ostream& cout, point& Point);
 
    friend istream& operator>>(istream& cin, point& Point);
};
 
 
 
friend ostream& operator<< (ostream& out, point& Point)
{
    out << "Point(" << setX << ", " << setY << ", " << ")";
    return out;
}
friend istream& operator>>(istream& in, const point& Point)
{
    in >> setX >> setY;
    return in;
}
 
class Vector :public point {
protected:
    float z;
public:
    Vector()noexcept :Vector(0, 0, 0) {}
    Vector(float ax, float ay, float az) {}
    ~Vector() = default;
    void setZ(double coordz) { z = coordz; }
    double getZ() { return z; }
    void point(double coordX, double coordY, double coordZ) {
        setX(coordX);
        setY(coordY);
        setZ(coordZ);
    
    }
 
    Vector operator+(const Vector other) {
        return Vector(x + other.x, y + other.y, z + other.z);
    }
 
    Vector operator()(const Vector other) {
        return Vector(x - other.x, y - other.y, z - other.z);
    }
 
    Vector operator!=(const Vector other) {
        return Vector(x = other.x, y = other.y, z = other.z);
    }
   bool operator!()
    {
       Vector temp; 
       (setX, setY, setZ);
        return temp;
    }
 
    friend ostream& operator<< (ostream& out, const Vector& other)
    {
            out << "Point(" << setX << ", " << setY << ", " << setZ << ")";
        return out;
    }
    friend istream& operator>>(istream& in, const Vector& other)
    {
        in >> setX >> setY >> setZ;     
        return in;
    }
 
 
};
 
int main()
{
    Vector a(1, 2, 3);
    Vector b(10, 20, 30);
 
}