Matlab设计简易计算器

效果如如下：
整个工程还是挺简单的，之前一直都是用matlab做信号处理，由于要做课程设计，就学了一下matlab的GUI。下面总结几个关键的地方。
（1）控件拉到自己喜欢的位置，并将控件的Text和Tag改好（不改也行，看个人习惯）
（2）设置一个全局变量global TextString，用来记录用户按了什么按钮，把字符串拼接起来
（3）做好每个按钮的回调函数的工作
（4）eval（）函数能够把字符串转换成matlab命令并返回结果（用在‘=’的回调函数）
function varargout = untitled2(varargin)
% UNTITLED2 MATLAB code for untitled2.fig
%      UNTITLED2, by itself, creates a new UNTITLED2 or raises the existing
%      singleton*.
%
%      H = UNTITLED2 returns the handle to a new UNTITLED2 or the handle to
%      the existing singleton*.
%
%      UNTITLED2('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in UNTITLED2.M with the given input arguments.
%
%      UNTITLED2('Property','Value',...) creates a new UNTITLED2 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before untitled2_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to untitled2_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 untitled2% Last Modified by GUIDE v2.5 09-Jul-2021 22:30:29% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...'gui_Singleton',  gui_Singleton, ...'gui_OpeningFcn', @untitled2_OpeningFcn, ...'gui_OutputFcn',  @untitled2_OutputFcn, ...'gui_LayoutFcn',  [] , ...'gui_Callback',   []);
if nargin && ischar(varargin{1})gui_State.gui_Callback = str2func(varargin{1});
endif nargout[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
elsegui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT% --- Executes just before untitled2 is made visible.
function untitled2_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 untitled2 (see VARARGIN)% Choose default command line output for untitled2
handles.output = hObject;% Update handles structure
guidata(hObject, handles);% UIWAIT makes untitled2 wait for user response (see UIRESUME)
% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line.
function varargout = untitled2_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;function window_Callback(hObject, eventdata, handles)
% hObject    handle to window (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)% Hints: get(hObject,'String') returns contents of window as text
%        str2double(get(hObject,'String')) returns contents of window as a double% --- Executes during object creation, after setting all properties.
function window_CreateFcn(hObject, eventdata, handles)
% hObject    handle to window (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
global TextString% --- Executes on button press in one.
function one_Callback(hObject, eventdata, handles)
% hObject    handle to one (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString =  get(handles.one,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)
% --- Executes on button press in two.
function two_Callback(hObject, eventdata, handles)
% hObject    handle to two (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.two,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in three.
function three_Callback(hObject, eventdata, handles)
% hObject    handle to three (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.three,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in four.
function four_Callback(hObject, eventdata, handles)
% hObject    handle to four (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.four,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in five.
function five_Callback(hObject, eventdata, handles)
% hObject    handle to five (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.five,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in six.
function six_Callback(hObject, eventdata, handles)
% hObject    handle to six (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.six,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in seven.
function seven_Callback(hObject, eventdata, handles)
% hObject    handle to seven (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.seven,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in eight.
function eight_Callback(hObject, eventdata, handles)
% hObject    handle to eight (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.eight,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in nine.
function nine_Callback(hObject, eventdata, handles)
% hObject    handle to nine (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.nine,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in addition.
function addition_Callback(hObject, eventdata, handles)
% hObject    handle to addition (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.addition,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in subtraction.
function subtraction_Callback(hObject, eventdata, handles)
% hObject    handle to subtraction (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.subtraction,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in multiplication.
function multiplication_Callback(hObject, eventdata, handles)
% hObject    handle to multiplication (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.multiplication,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in division.
function division_Callback(hObject, eventdata, handles)
% hObject    handle to division (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.division,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in sqrt.
function sqrt_Callback(hObject, eventdata, handles)
% hObject    handle to sqrt (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.sqrt,'String')
TextString = strcat(TextString , textString) 
set(handles.window,'string',textString)% --- Executes on button press in sin.
function sin_Callback(hObject, eventdata, handles)
% hObject    handle to sin (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.sin,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in cos.
function cos_Callback(hObject, eventdata, handles)
% hObject    handle to cos (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.cos,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in tan.
function tan_Callback(hObject, eventdata, handles)
% hObject    handle to tan (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.tan,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in square.
function square_Callback(hObject, eventdata, handles)
% hObject    handle to square (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.square,'String')
TextString = strcat(TextString ,'^2') 
set(handles.window,'string',textString)% --- Executes on button press in cot.
function cot_Callback(hObject, eventdata, handles)
% hObject    handle to cot (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.cot,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in equal.
function equal_Callback(hObject, eventdata, handles)
% hObject    handle to equal (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
ans = eval(TextString)
a = strcat(TextString,'=')
aa = strcat(a,num2str(ans))
set(handles.window,'string',aa)
TextString = []% --- Executes on button press in right.
function right_Callback(hObject, eventdata, handles)
% hObject    handle to right (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.right,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in left.
function left_Callback(hObject, eventdata, handles)
% hObject    handle to left (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
textString = get(handles.left,'String')
TextString = strcat(TextString ,textString) 
set(handles.window,'string',textString)% --- Executes on button press in qingkong.
function qingkong_Callback(hObject, eventdata, handles)
% hObject    handle to qingkong (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global TextString
TextString = []