matlab计算器gui

实现一个基本的 Matlab 计算器 GUI 可以按照以下步骤进行：

1. 创建一个新的 Matlab GUI 程序，可以使用 GUIDE 工具来实现。

2. 在 GUI 界面上添加一个文本框用于显示计算结果，以及一个按钮用于触发计算操作。

3. 使用 Matlab 的 eval 函数对计算表达式进行求值，并将结果显示在文本框中。

4. 添加一些输入限制和错误处理，例如不能输入非数值字符等。

下面是一份简单的 Matlab 计算器 GUI 代码示例：

function varargout = calculator_gui(varargin)
% CALCULATOR_GUI MATLAB code for calculator_gui.fig
%      CALCULATOR_GUI, by itself, creates a new CALCULATOR_GUI or raises the existing
%      singleton*.
%
%      H = CALCULATOR_GUI returns the handle to a new CALCULATOR_GUI or the handle to
%      the existing singleton*.
%
%      CALCULATOR_GUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CALCULATOR_GUI.M with the given input arguments.
%
%      CALCULATOR_GUI('Property','Value',...) creates a new CALCULATOR_GUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before calculator_gui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to calculator_gui_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help calculator_gui

% Last Modified by GUIDE v2.5 09-Jul-2021 17:27:14

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @calculator_gui_OpeningFcn, ...
                   'gui_OutputFcn',  @calculator_gui_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before calculator_gui is made visible.
function calculator_gui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to calculator_gui (see VARARGIN)

% Choose default command line output for calculator_gui
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes calculator_gui wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = calculator_gui_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on button press in calculate_button.
function calculate_button_Callback(hObject, eventdata, handles)
% hObject    handle to calculate_button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get the input expression from the edit text box
input_expression = get(handles.input_edit, 'String');

% Evaluate the expression
try
    result = eval(input_expression);
    set(handles.result_text, 'String', num2str(result));
catch
    set(handles.result_text, 'String', 'Error');
end


% --- Executes during object creation, after setting all properties.
function input_edit_CreateFcn(hObject, eventdata, handles)
% hObject    handle to input_edit (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

在 GUIDE 工具中创建一个新的 GUI 程序，添加一个文本框和一个按钮，并为按钮添加一个回调函数 `calculate_button_Callback`。在回调函数中，使用 `eval` 函数对输入的表达式进行求值，并将结果显示在文本框中。同时，添加一些输入限制和错误处理，例如不能输入非数值字符等。

上述代码仅供参考，可以根据需要进行修改和优化。