constructor TMyObj.Create;
begin
 inherited;
end;

为什么这也不起作用？

function TMyObjEx.Import(CONST FileName: string; CONST x,y,z: Integer): string;
begin
 result:= inherited; // Import(FileName,x,z);  <--- Compiler says: "incompatible types"
 //do other stuff here
end;

TMyObjEx的声明是这样的：

TYPE

TMyObj = class(TChObj)
      private
      protected
      public
       function Import (CONST FileName: string; CONST x,z: Integer): string; virtual;     
     end;

TMyObjEx= class(TMyObj)
          private
          protected
          public
           function Import(CONST FileName: string; CONST x,z: Integer): string; override;   
         end;