[問題] 請問語法哪裡有錯?

[hikaru06 (if(Ithink) exist; )]

[error message]

main.cpp cannot call member function `Shape* Shape::Docreate()' without object



[main.h]

#include <iostream>
using namespace std;
class Shape
 {
      public: virtual void print() {
      cout << "Shape." << endl;
      }

      Shape* Docreate();
 };
class test : public Shape
{
 public:
        void print(){
        cout << " test " << endl;
        }


};


 class Circle: public Shape
 {
      public: void print(){
      cout << "Circle." << endl;
      }


 };
 class Rect: public Circle
 {
      public: void print() {
      cout << "Rect." << endl;
      }
 };
=============================================================================
[main.cpp]

#include <iostream>
#include "main.h"
using namespace std;



Shape* Shape::Docreate()
 {

 return new test;
 }

int main()
{

   Rect s2;
   //Shape *s[2] = {new Circle(), new Rect()};
   Shape *s3 = Shape::Docreate();  // error ! 不太知道小弟觀念哪裡有錯，請指教!
   Shape *s1 = new Circle;

   s1 = &s2;
   s3->print();
   s1->print();
   //s2->print();
   system("pause");
   return 0;
}

--
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◆ From: 125.225.16.127
推 chrisdar:static Shape* Docreate() {...}
→ hikaru06:謝謝樓上，可以請問為何要加上static?
推 chrisdar:是從這裡看的 Shape::Docreate()
推 Dreamer77:這樣不用宣告object 即可使用member variable/function
→ hikaru06:樓上 我搞懂了 謝謝您~~