简单问题：GetDocument()

class CGetSiteView : public CEditView
{
...
public:
CGetSiteDoc * GetDocument();

编译报错：

error C2143: syntax error : missing ';' before '*'
error C2501: 'CGetSiteDoc' : missing storage-class or type specifiers
error C2501: 'GetDocument' : missing storage-class or type specifiers