Перегрузка оператора сравнения ( no match for 'operator==' )

#include <iostream>
#include <cmath>
using namespace std;
 
class Vector{
    double x,y,z;
public:
 
    Vector(double x=0,double y=0,double z=0);
    void Vset(double x=0,double y=0,double z=0);
    double Len();
    Vector operator+(Vector B);
    Vector operator-(Vector B);
    double operator*(Vector B);//Scalar product
    Vector operator=(Vector B);
    bool   operator==(Vector B);
    friend bool Comp(Vector A, Vector B);
    friend ostream &operator<<(ostream &stream, Vector Object);
    friend istream &operator>>(istream &stream, Vector &Object);
    friend Vector operator*(Vector A, double L);
    friend Vector operator*(double L, Vector A);
};
int main(){
    Vector A(1,2);
    A.Vset(5,2,3);//Setter
    Vector B;
    cin >> B;
    cout << A << endl <<"Length A: " << A.Len() << endl;
    cout << B << endl;
    cout << "Vector A+B: " << A+B << endl;
    cout << "Vector A-B: " << A-B << endl;
    cout << "Vector 2*B: " << 2*B << endl;
    cout << "Vector A*B: " << A*B << endl;
    A = B;
    Vector P(1,2,3),V(4,5,6);
    cout << "(A == B) ?: " << P == V;
 
    return 0;
}
Vector::Vector(double x,double y,double z){
    this->x=x;
    this->y=y;
    this->z=z;
}
double Vector::Len(){
 
    return sqrt(x*x+y*y+z*z);
}
Vector Vector::operator+(Vector B){
    Vector S;
    S.x = x + B.x;
    S.y = y + B.y;
    S.z = z + B.z;
    return S;
}
void Vector::Vset(double x,double y,double z){
    this->x=x;
    this->y=y;
    this->z=z;
}
Vector operator*(Vector A, double l){
    Vector P(A.x*l, A.x*l, A.x*l);
    return P;
}
Vector operator*(double l, Vector A){
    Vector P(A.x*l, A.y*l, A.z*l);
    return P; 
}
double Vector::operator*(Vector B){
 
    return this->x*B.x +this->y*B.y +this->z*B.z;
}
Vector Vector::operator-(Vector B){
    Vector S;
    S.x = x - B.x;
    S.y = y - B.y;
    S.z = z - B.z;
    return S;
}
ostream &operator<<(ostream &stream, Vector Object){
    stream << "Vector(" << Object.x << ", " << Object.y << ", " << Object.z << ")";
    return stream;
}
istream &operator>>(istream &stream, Vector &Object){
    cout << endl << "Enter coordinates of vector." << endl;
    cout << "x=";stream >> Object.x;
    cout << "y=";stream >> Object.y;
    cout << "z=";stream >> Object.z;
    return stream;
}
Vector Vector::operator = (Vector B){
    this->x = B.x;
    this->y = B.y;
    this->z = B.z;
    return *this;
}
bool Vector::operator == (Vector B){
        if (this->x != B.x || this->y != B.y || this->z != B.z) return 0;
        else return 1;
}