конструктор копирования

#include <iostream>
 
using namespace std;
 
class Shape
{
public:
    Shape(){ }
    virtual ~Shape(){ }
 
    virtual string ToString() const = 0;
    virtual string GetType() const { return "Shape"; }
 
};
 
 
class Point : public Shape
{
public:
    Point();
    Point(string s, double x, double y);
    Point(const Point& _point);
    virtual ~Point() { } //may be virtual? and may be {}
 
    virtual string ToString() const {  };
    string GetPointName() { return name; }
    double GetCoordX() const { return coordX; }
    double GetCoordY() const { return coordY; }
    virtual string GetType() const { return "Point"; }
 
protected:
    string name;
    double coordX;
    double coordY;
};
 
Point::Point():
name("no_name"), coordX(0.0), coordY(0.0)
{
}
 
Point::Point(string s, double x, double y):
name(s), coordX(x), coordY(y)
{
}
 
Point::Point(const Point& _point):
name(_point.name), coordX(_point.coordX), coordY(_point.coordY)
{
}
 
 
class Rect : public Shape
{
public:
    Rect();
    Rect(string s, Point & pointA, Point & pointB, Point & pointC, Point & pointD);
    Rect(const Rect & _rect);
    virtual ~Rect() { }
 
    virtual string ToString() const {  }
    virtual string GetType() const { return "Rectangle"; }
protected:
    string name;
    Point a, b, c, d;
};
 
Rect::Rect():
name("no_name"), a(), b(), c(), d()
{
}
 
Rect::Rect(string s, Point & pointA, Point & pointB, Point & pointC, Point & pointD):
name(s), a(pointA), b(pointB), c(pointC), d(pointD)
{
}
 
Rect::Rect(const Rect & _rect):
name(_rect.name), a(_rect.a), b(_rect.b), c(_rect.c), d(_rect.d)
{
}
 
 
class Square : public Rect
{
public:
    Square();
    Square(string s, Point & pointA, Point & pointB, Point & pointC, Point & pointD);
    Square(const Square & _square);
    virtual ~Square() { }
    virtual string GetType() const { return "Square"; }
};
 
Square::Square():
Rect()
{
}
 
Square::Square(string s, Point & pointA, Point & pointB, Point & pointC, Point & pointD):
Rect(s, pointA, pointB, pointC, pointD)
{
}
 
Square::Square(const Square & _square):
Rect(_square.name, _square.a, _square.b, _square.c, _square.d)
{
}
 
 
int main()
{
    return 0;
}

In copy constructor 'Square::Square(const Square&)':
106: error: no matching function for call to 'Rect::Rect(const std::string&, const Point&, const Point&, const Point&, const Point&)'
78: note: candidates are: Rect::Rect(const &Rect)
73: note:                 Rect::Rect(std::string, Point&, Point&, Point&, Point&)
68: note:                 Rect::Rect()

Rect(string s, const Point & pointA, const Point & pointB, const Point & pointC, const Point & pointD);