VC 6.0 MFC建的单文档程序，自动生成的代码怎么有语法错误。建了2次工程了，都一样的错误、、

C/C++ code

class CSingleDocumentView : public CView{protected: // create from serialization only    CSingleDocumentView();    DECLARE_DYNCREATE(CSingleDocumentView)// Attributespublic:    CSingleDocumentDoc* GetDocument();// Operationspublic:// Overrides    // ClassWizard generated virtual function overrides    //{{AFX_VIRTUAL(CSingleDocumentView)    public:    virtual void OnDraw(CDC* pDC);  // overridden to draw this view    virtual BOOL PreCreateWindow(CREATESTRUCT& cs);

这报错了：CSingleDocumentDoc* GetDocument(); 错误是：error C2143: syntax error : missing ';' before '*'

[解决办法]
加上#include "SingleDocumentDoc.h"，应该是没有找到CSingleDocumentDoc的缘故。