多继承 Create 的问题

Question

类1
    Panel = Class(TPanel)
        public
            constructor Create(c:TComponent);
    End;
    implementation
    constructor Panel.Create(c:TComponent);
    begin
        inherited Create(c);
    end;类2
    PanelStep = Class(Panel)
        public
            constructor Create(c:TComponent);
    End;
    implementation
    constructor PanelStep.Create(c:TComponent);
    begin
        inherited Create(c);
    end;PanelStep 调用 Panel.Create 
总是报错!!!!????

Answer 1

没加override;Panel = Class(TPanel) 
        public 
            constructor Create(c:TComponent);override; 
    End; 
    implementation 
    constructor Panel.Create(c:TComponent); 
    begin 
        inherited Create(c); 
    end; 
    PanelStep = Class(Panel) 
        public 
            constructor Create(c:TComponent); override;
    End; 
    implementation 
    constructor PanelStep.Create(c:TComponent); 
    begin 
        inherited Create(c); 
    end; 

Answer 2

没用一样报错~~~~constructor PanelStep.Create(c:TComponent); 
    begin 
        inherited Create(c); 
    end; 
 除非不要调用 inherited Create(c); 

Answer 3

inherited Create(nil);传入 nil 值就不会报错!!!!!真是怪了啊???????