matlab中push,如何在GUI中pushbutton的回调函数中嵌入函数

在pushbutton的回调函数中加入函数后程序无法运行，具体情况如下：

程序代码：

function varargout = just_try(varargin)

% JUST_TRY MATLAB code for just_try.fig

%      JUST_TRY, by itself, creates a new JUST_TRY or raises the existing

%      singleton*.

%

%      H = JUST_TRY returns the handle to a new JUST_TRY or the handle to

%      the existing singleton*.

%

%      JUST_TRY('CALLBACK',hObject,eventData,handles,...) calls the local

%      function named CALLBACK in JUST_TRY.M with the given input arguments.

%

%      JUST_TRY('Property','Value',...) creates a new JUST_TRY or raises the

%      existing singleton*.  Starting from the left, property value pairs are

%      applied to the GUI before just_try_OpeningFcn gets called.  An

%      unrecognized property name or invalid value makes propert