function varargout = address_book(varargin)
if nargin <= 1
%GUI發布
fig = openfig(mfilename,'reuse');
set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));
handles = guihandles(fig);
guidata(fig,handles);
if nargin ==0
   %裝入默認的地址簿
   Check_And_Load([],handles)
elseif exist(varagin{1},'file')
   Check_And_Load(varargin{1},handles)
else
   %如果文件不存在，則返回一個錯誤對話框并將文本設置為空字符串
   errordlg('File Not Found','File Load Error')
   set(handles.Contact_Name,'String','')
   set (handles.Contact_Phone,'String','')
end
if nargout >0
   varargout{1} = fig;
end
elseif ischar(varargin{1})
   %調用指定的子函數或回調函數
   try
      [varargout{1:nargout}] = feval(varargin{:});
   catch
   disp(lasterr);
   end
end