polymorphism by dynamic binding

[ptg]

im working on a toy hierarchy but im getting a linkage error
error LNK2019: unresolved external symbol "public: __thiscall StuffedToy::StuffedToy(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,double)" (??0StuffedToy@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0N@Z) referenced in function _main

fatal error LNK1120: 1 unresolved externals

i dont know why im getting this can anyone help?

#include<iostream>
#include <string>
using namespace std;

class Toy{
public:
	Toy(const string &,double=0.0);
	void setName(const string &);
	string getName()const;
	void setID(double);
	double getID()const;

	virtual void print() const;

};
class StuffedToy : public Toy{
public:
	StuffedToy(const string&,const string&,double=0.0);
	void setColor(const string &);
	string getColor()const;

	virtual void print() const;

};

int main(){

	StuffedToy stuffedToy("bear","brown",123);
	StuffedToy *stuffedToyPtr = 0;

                stuffedToyPtr = &stuffedToy;
	cout<<"dynamic binding: ";
	stuffedToyPtr->print();

	cout<<endl;

	return 0;
}