Matlab大作业——简易计算器一．实现的功能简易计算器能够计算简单的加减乘除，能够将计算过程和结果显示出来，并且能够清空和删除数字。
二．实现方式通过Matlab中的GUI接口设计这个简易计算器，通过GUI中的pushbottom设计输入数字的键和加减乘除等于等键，然后通过edit text设计显示屏。
更改回调函数实现相关的计算功能。
三．程序分析0~9数字键的代码设置%全局变量locaval用于存储用户输入的多位数值%全局变量gloval2用于存储待处理的第二位数值function pushbutton1_Callback(hObject, eventdata, handles)global locaval;a = get(handles.pushbutton1,'String');locaval=strcat(locaval,a);set(handles.text1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);加减乘除键的代码设置%全局变量flagnum存储运算符标志%全局变量global1用于储存第一个待处理数值function pushbutton10_Callback(hObject, eventdata, handles)a = get(handles.pushbutton10,'String');b = get(handles.text1,'String');set(handles.text1,'String',a);global flagnumglobal gloval1global locavallocaval=' ';flagnum=1;gloval1=b;guidata(hObject, handles);等号键功能的实现%根据flagnum运算标志用switch决策语句实现相应计算%需注意相应数据类型的转化function pushbutton17_Callback(hObject, eventdata, handles) global flagnumglobal gloval1global gloval2global locavallocaval=' ';gloval1=str2num(gloval1);gloval2=str2num(gloval2);case1=gloval1/gloval2;case2=gloval1*gloval2;case3=gloval1-gloval2;case4=gloval1+gloval2;case1=num2str(case1);case2=num2str(case2);case3=num2str(case3);case4=num2str(case4);switch flagnum;case 1set(handles.text1,'String',case1);case 2set(handles.text1,'String',case2);case 3set(handles.text1,'String',case3);case 4set(handles.text1,'String',case4);endguidata(hObject,handles)Backspace键的代码设置%算法实现：MA TLAB是用矩阵存储数据的，相应的可以取文本框的前N-1实现其功能function pushbutton19_Callback(hObject, eventdata, handles)textString = get(handles.text1,'String');if(strcmp(textString,'0.')==1)set(handles.text1,'String','0.') ;elsess=char(textString);l=length(textString);textString=ss(1:l-1);set(handles.text1,'String',textString)endguidata(hObject,handles)清除按钮函数function pushbutton20_Callback(hObject, eventdata, handles)global locavallocaval=' ';set(handles.text1,'String','0.');guidata(hObject,handles)四．程序展示function varargout = jisuanji(varargin)% JISUANJI MATLAB code for jisuanji.fig% JISUANJI, by itself, creates a new JISUANJI or raises the existing% singleton*.%% H = JISUANJI returns the handle to a new JISUANJI or the handle to% the existing singleton*.%% JISUANJI('CALLBACK',hObject,eventData,handles,...) calls the local% function named CALLBACK in JISUANJI.M with the given input arguments.%% JISUANJI('Property','Value',...) creates a new JISUANJI or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before jisuanji_OpeningFcn gets called. An % unrecognized property name or invalid value makes propertyapplication% stop. All inputs are passed to jisuanji_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 edit1 to modify the response to help jisuanji% Last Modified by GUIDE v2.5 04-Jun-2013 16:55:11% Begin initialization code - DO NOT EDITglobal gloval1;global gloval2;global flagnum;global locaval;gui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ...'gui_Singleton', gui_Singleton, ...'gui_OpeningFcn', @jisuanji_OpeningFcn, ...'gui_OutputFcn', @jisuanji_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 jisuanji is made visible.function jisuanji_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 jisuanji (see VARARGIN)% Choose default command line output for jisuanjihandles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes jisuanji wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line. function varargout = jisuanji_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 structurevarargout{1} = handles.output;function edit1_Callback(hObject, eventdata, handles)% hObject handle to edit1 (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 edit1 as edit1 % str2double(get(hObject,'String')) returns contents of edit1 as a doubleglobal locavallocaval=str2num(locaval);locaval=1/locaval;set(handles.edit1,'String',locaval);locaval=' ';guidata(hObject,handles)% --- Executes during object creation, after setting all properties. function edit1_CreateFcn(hObject, eventdata, handles)% hObject handle to edit1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcnscalled% 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% --- Executes on button press in pushbutton3.function pushbutton3_Callback(hObject, eventdata, handles)% hObject handle to pushbutton3 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton3,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton4.function pushbutton4_Callback(hObject, eventdata, handles)% hObject handle to pushbutton4 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton4,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton5.function pushbutton5_Callback(hObject, eventdata, handles)% hObject handle to pushbutton5 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton5,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton6.function pushbutton6_Callback(hObject, eventdata, handles)% hObject handle to pushbutton6 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)a = get(handles.pushbutton6,'String');b = get(handles.edit1,'String');set(handles.edit1,'String',a);global flagnumglobal gloval1global locavallocaval=' ';flagnum=1;gloval1=b;guidata(hObject, handles);% --- Executes on button press in pushbutton7.function pushbutton7_Callback(hObject, eventdata, handles)% hObject handle to pushbutton7 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton7,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton8.function pushbutton8_Callback(hObject, eventdata, handles)% hObject handle to pushbutton8 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton8,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton9.function pushbutton9_Callback(hObject, eventdata, handles)% hObject handle to pushbutton9 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton9,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton10.function pushbutton10_Callback(hObject, eventdata, handles)% hObject handle to pushbutton10 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)a = get(handles.pushbutton10,'String');b = get(handles.edit1,'String');set(handles.edit1,'String',a);global flagnumglobal gloval1global locavallocaval=' ';flagnum=2;gloval1=b;guidata(hObject, handles);% --- Executes on button press in pushbutton11.function pushbutton11_Callback(hObject, eventdata, handles)% hObject handle to pushbutton11 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton11,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton12.function pushbutton12_Callback(hObject, eventdata, handles)% hObject handle to pushbutton12 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton12,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton13.function pushbutton13_Callback(hObject, eventdata, handles)% hObject handle to pushbutton13 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton13,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton14.function pushbutton14_Callback(hObject, eventdata, handles)% hObject handle to pushbutton14 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)a = get(handles.pushbutton14,'String');b = get(handles.edit1,'String');set(handles.edit1,'String',a);global flagnumglobal gloval1global locavallocaval=' ';flagnum=3;gloval1=b;guidata(hObject, handles);% --- Executes on button press in pushbutton16.function pushbutton16_Callback(hObject, eventdata, handles)% hObject handle to pushbutton16 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)a = get(handles.pushbutton16,'String');b = get(handles.edit1,'String');set(handles.edit1,'String',a);global flagnumglobal gloval1global locavallocaval=' ';flagnum=4;gloval1=b;guidata(hObject, handles);% --- Executes on button press in pushbutton17.function pushbutton17_Callback(hObject, eventdata, handles)% hObject handle to pushbutton17 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locaval;a = get(handles.pushbutton17,'String');locaval=strcat(locaval,a);set(handles.edit1,'String',locaval);global gloval2gloval2=locaval;guidata(hObject, handles);% --- Executes on button press in pushbutton18.function pushbutton18_Callback(hObject, eventdata, handles)% hObject handle to pushbutton18 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global flagnumglobal gloval1global gloval2global locavallocaval=' ';gloval1=str2num(gloval1);gloval2=str2num(gloval2);case1=gloval1/gloval2;case2=gloval1*gloval2;case3=gloval1-gloval2;case4=gloval1+gloval2;case1=num2str(case1);case2=num2str(case2);case3=num2str(case3);case4=num2str(case4);switch flagnum;case 1set(handles.edit1,'String',case1);case 2set(handles.edit1,'String',case2);case 3set(handles.edit1,'String',case3);case 4set(handles.edit1,'String',case4);endguidata(hObject,handles)% --- Executes on button press in pushbutton19.function pushbutton19_Callback(hObject, eventdata, handles)% hObject handle to pushbutton19 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) edit1String = get(handles.edit1,'String');if(strcmp(edit1String,'0.')==1)set(handles.edit1,'String','0.') ;elsess=char(edit1String);l=length(edit1String);edit1String=ss(1:l-1);set(handles.edit1,'String',edit1String)endguidata(hObject,handles)% --- Executes on button press in pushbutton20.function pushbutton20_Callback(hObject, eventdata, handles)% hObject handle to pushbutton20 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global locavallocaval=' ';set(handles.edit1,'String','0');guidata(hObject,handles)function edit2_Callback(hObject, eventdata, handles)% hObject handle to edit2 (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 edit2 as text% str2double(get(hObject,'String')) returns contents of edit2 as a double% --- Executes during object creation, after setting all properties. function edit2_CreateFcn(hObject, eventdata, handles)% hObject handle to edit2 (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五．结果展示。
