在matlab用gui写一个计算机

好的，我可以为您提供一个简单的 MATLAB GUI 计算器示例代码。此代码将创建一个包含数字按钮和运算符按钮的 GUI 窗口，用户可以通过单击这些按钮来构建算术表达式，并通过单击“计算”按钮计算表达式结果。

首先，创建一个名为“calculator.fig”的 GUI 窗口，将数字按钮和运算符按钮添加到窗口上，并将它们分别命名为“btn1”、“btn2”、“btn3”、“btn4”、“btn5”、“btn6”、“btn7”、“btn8”、“btn9”、“btn0”、“btnPlus”、“btnMinus”、“btnMultiply”、“btnDivide”和“btnCalculate”。然后，使用以下代码将计算器窗口与 MATLAB 代码关联：

function varargout = calculator(varargin)
% CALCULATOR MATLAB code for calculator.fig
%      CALCULATOR, by itself, creates a new CALCULATOR or raises the existing
%      singleton*.
%
%      H = CALCULATOR returns the handle to a new CALCULATOR or the handle to
%      the existing singleton*.
%
%      CALCULATOR('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CALCULATOR.M with the given input arguments.
%
%      CALCULATOR('Property','Value',...) creates a new CALCULATOR or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before calculator_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to calculator_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

% Last Modified by GUIDE v2.5 25-Jun-2021 13:28:30

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @calculator_OpeningFcn, ...
                   'gui_OutputFcn',  @calculator_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 is made visible.
function calculator_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 (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = calculator_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 btn1.
function btn1_Callback(hObject, eventdata, handles)
% hObject    handle to btn1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '1');


% --- Executes on button press in btn2.
function btn2_Callback(hObject, eventdata, handles)
% hObject    handle to btn2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '2');


% --- Executes on button press in btn3.
function btn3_Callback(hObject, eventdata, handles)
% hObject    handle to btn3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '3');


% --- Executes on button press in btn4.
function btn4_Callback(hObject, eventdata, handles)
% hObject    handle to btn4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '4');


% --- Executes on button press in btn5.
function btn5_Callback(hObject, eventdata, handles)
% hObject    handle to btn5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '5');


% --- Executes on button press in btn6.
function btn6_Callback(hObject, eventdata, handles)
% hObject    handle to btn6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '6');


% --- Executes on button press in btn7.
function btn7_Callback(hObject, eventdata, handles)
% hObject    handle to btn7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '7');


% --- Executes on button press in btn8.
function btn8_Callback(hObject, eventdata, handles)
% hObject    handle to btn8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '8');


% --- Executes on button press in btn9.
function btn9_Callback(hObject, eventdata, handles)
% hObject    handle to btn9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '9');


% --- Executes on button press in btn0.
function btn0_Callback(hObject, eventdata, handles)
% hObject    handle to btn0 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '0');


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


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


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


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


% --- Executes on button press in btnCalculate.
function btnCalculate_Callback(hObject, eventdata, handles)
% hObject    handle to btnCalculate (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
expression = get(handles.txtExpression, 'String');
try
    result = eval(expression);
    set(handles.txtResult, 'String', num2str(result));
catch
    set(handles.txtResult, 'String', 'Error');
end


% --- Helper function to append a character to the expression text box
function append_expression(handles, char)
expression = get(handles.txtExpression, 'String');
if strcmp(expression, '0')
    expression = char;
else
    expression = strcat(expression, char);
end
set(handles.txtExpression, 'String', expression);

此代码将创建一个名为“calculator.m”的 MATLAB 脚本，其中包含了许多回调函数，用于处理用户与 GUI 窗口的交互。

最后，将以下代码添加到脚本的末尾以启动 GUI 窗口：

% --- Executes on button press in btn1.
function btn1_Callback(hObject, eventdata, handles)
% hObject    handle to btn1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
append_expression(handles, '1');

% 创建 GUI 窗口并等待用户交互
handles.output = hObject;
guidata(hObject, handles);
uiwait(handles.figure1);

现在，运行脚本并单击“运行”按钮，将显示计算器 GUI 窗口。用户可以单击数字和运算符按钮来构建算术表达式，然后单击“计算”按钮计算表达式结果。