MATLAB 计算器的设计

1、华东交通大学课程设计报告课 程：MATLAB年 级：2014级 专 业：通信工程班 级：卓越班 学 号：20140610080117 姓 名：江其琪 指导教师：邹丹 第1页 目录第1章 课程设计概要.11.1设计介绍.11.2 基本功能要求1第2章 设计思路与程序22.1 设计思路.22.2 设计功能模块.3 第3章 运行结果及分析93.1运行结果.93.2结果分析.10第4章 心得体会14参考文献12 附录(源程序代码）.12第1章 课程设计概要1.1设计介绍本课程设计是利用MATLAB的GUI用户界面所设计的普通计算器。该计算器具有以下功能：1、具有友好的用户图形界面，实现十进制数的加、减

2、、乘、除等简单计算。2、实现部分科学计算函数功能，如求正弦、余弦、平方根等。3、能实现小数运算。4、有清除键，能进行清除操作。1.2基本功能要求利用matlab强大的数值计算功能，便捷的GUI设计功能，实现一个图形用户界面的计算器程序。第 24 页第2章 课题设计内容与步骤2.1设计内容该课程设计的计算器界面如图所示利用MATLAB GUI设计实现一个图形用户界面的计算器程序，可以实现：A. 具有友好的用户图形界面。实现十进制数的加、减、乘、除、乘方、取模等简单计算。B. 科学计算函数，包括(反)正弦、(反)余弦、(反)正切、(反)余切、开方、指数等函数运行。C. 能够保存上次历史计算的答案，

3、先是答案存储器中得内容。D. 有清除键，能清除操作，并对不正确的表达式能指出其错误原因。E.进行二进制数转十进制数及十进制数转二进制数。F.直接退出。2.2设计步骤2.2.1打开GUI界面输入Guide 回车或者在工具栏上点击图标打开Guide 窗口：2.2.2添加按钮2.2.3根据按钮的作用及视觉效果做一定的修改双击按钮（Puch Button）进入按键属性修改显示字符串大小、字体和颜色，然后对按钮的位置进行排布，尽量使按钮集中在静态文本框下面。2.2.4保存、对按钮添加算法各模块算法如下：A.数字键设计：按键“0”：通过get函数获得输入的字符，函数strca

4、t获得字符'0',并用set函数进行显示输出 textString=get(handles.edit1,'String'); if(strcmp(textString,'0')=1)    set(handles.edit1,'String','0')  else textString=strcat(textString,'0'); set(handles.edit1,'String'

5、,textString) end其他数字按键同上.B.四则运算函数：按键“+”：通过get函数获得输入的字符，函数strcat获得字符'+',并用set函数进行显示输出 textString=get(handles.edit1,'String'); ss=char(textString);l=length(textString); if(ss(l)='+'|ss(l)='-'|ss(l)='*'|ss(l)='/'|ss(l)='.')

6、0;    textString=ss(1:l-1); end textString=strcat(textString,'+');set(handles.edit1,'String',textString)按键“-”：通过get函数获得输入的字符，函数strcat获得字符'-',并用set函数进行显示输出 textString=get(handles.edit1,'String');ss=char(textString); l=length(text

7、String); if(ss(l)='+'|ss(l)='-'|ss(l)='*'|ss(l)='/'|ss(l)='.')     textString=ss(1:l-1);end textString=strcat(textString,'-'); set(handles.edit1,'String',textString)按键“*”：通过get函数获得输入的字符，函数strcat获得字符'*

8、',并用set函数进行显示输出 textString=get(handles.edit1,'String'); ss=char(textString); l=length(textString); if(ss(l)='+'|ss(l)='-'|ss(l)='*'|ss(l)='/'|ss(l)='.')     textString=ss(1:l-1); end textString

9、=strcat(textString,'*'); set(handles.edit1,'String',textString)按键“/”：通过get函数获得输入的字符，函数strcat获得字符'/',并用set函数进行显示输出 textString=get(handles.edit1,'String'); ss=char(textString); l=length(textString); if(ss(l)='+'|ss(l)='-'|ss(l)=&

10、#39;*'|ss(l)='/'|ss(l)='.')     textString=ss(1:l-1); end textString=strcat(textString,'/'); set(handles.edit1,'String',textString)按键“.”：通过get函数获得输入的字符，函数strcat获得字符'.',并用set函数进行显示输出 textString=get(handles.edit1,

11、'String'); ss=char(textString); l=length(textString); if(ss(l)='+'|ss(l)='-'|ss(l)='*'|ss(l)='/'|ss(l)='.')     textString=ss(1:l-1); end textString=strcat(textString,'.'); set(handles.edit

12、1,'String',textString)按键“+/-”：通过get函数获得输入的字符，函数strcat获得字符'+/-',并用set函数进行显示输出 if(strcmp(textString,'0')=1)    set(handles.edit1,'String','0')  else a=strread(textString,'%f'); a=0-a; set(handles.edit1,&#

13、39;String',a) end C.科学计算函数：按键“sin”：通过get函数获得输入的字符，函数strread获得输入字符,并用sin函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); a=strread(textString,'%f'); a=sin(a); set(handles.edit1,'String',a)按键“cos”：通过get函数获得输入的字符，函数strread获得输入字符,并用cos函数计算结果，

14、set函数进行显示输出textString=get(handles.edit1,'String'); a=strread(textString,'%f'); a=cos(a); set(handles.edit1,'String',a)按键“tan”：通过get函数获得输入的字符，函数strread获得输入字符,并用tan函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); if(strcmp(textString,'1.

15、57')=1)|(strcmp(textString,'-1.57')=1)    set(handles.edit1,'String','inf'); else a=strread(textString,'%f'); a=tan(a); set(handles.edit1,'String',a) end按键“cot” ：通过get函数获得输入的字符，函数strread获得输入字符,并用cot函数计算结果，s

16、et函数进行显示输出textString=get(handles.edit1,'String'); if(strcmp(textString,'3.14')=1)|(strcmp(textString,'0')=1)|(strcmp(textString,'-3.14')=1)；    set(handles.edit1,'String','inf'); else a=strread(textString,'%f'

17、);a=cot(a); set(handles.edit1,'String',a) end按键“arcsin”：通过get函数获得输入的字符，函数strread获得输入字符,并用arcsin函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); a=strread(textString,'%f'); a=arcsin(a); set(handles.edit1,'String',a)按键“arccos”：通过get函数获得

18、输入的字符，函数strread获得输入字符,并用arccos函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); a=strread(textString,'%f');a=arccos(a); set(handles.edit1,'String',a)按键“arctan”：通过get函数获得输入的字符，函数strread获得输入字符,并用arctan函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String&

19、#39;); a=strread(textString,'%f'); a=arctan(a); set(handles.edit1,'String',a)按键“arccot”：通过get函数获得输入的字符，函数strread获得输入字符,并用arccot函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); a=strread(textString,'%f');a=arccot(a); set(handles.edit1,

20、'String',a)按键“log2”：通过get函数获得输入的字符，函数strread获得输入字符,并用log2函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); if(strcmp(textString,'0')=1)    set(handles.edit1,'String','error') else a=strread(textString,'%f');a=

21、log2(a); set(handles.edit1,'String',a) end按键“log10”：通过get函数获得输入的字符，函数strread获得输入字符,并用log10函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String');if(strcmp(textString,'0')=1)    set(handles.edit1,'String','error')  else

22、 a=strread(textString,'%f'); a=sin(a); set(handles.edit1,'String',a) end按键“x2”：通过get函数获得输入的字符，函数strread获得输入字符,并用语句a=a*a计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); a=strread(textString,'%f'); a=a*a; set(handles.edit1,'

23、String',a)按键“sqrt”：通过get函数获得输入的字符，函数strread获得输入字符,并用sqrt函数计算结果，set函数进行显示输出textString=get(handles.edit1,'String'); if(strcmp(textString,'0')=1)    set(handles.edit1,'String','0')  else a=strread(textString,'%f'); 

24、;a=sqrt(a); set(handles.edit1,'String',a) endD.”DEL”键：通过取屏幕值，计算出其字符长度，然后取其前N-1项的值来实现退格： textString=get(handles.edit1,'String');if(strcmp(textString,'0')=1)&(jj=0)    set(handles.edit1,'String','0')  else ss

25、=char(textString);     l=length(textString);     textString=ss(1:l-1); set(handles.edit1,'String',textString)E.清屏“C”键函数：将所有的字符置为'0' set(handles.edit1,'String','0')F.“=”的实现：通过get函数获得输入的字符，并用eval函数计算结果，set函数进行显

26、示输出 a=get(handles.edit1,'string') b=eval(a) set(handles.edit1,'string',num2str(b)第3章 运行结果及分析3.1运行结果A.  数字键：B.四则运算函数:C. 科学计算函数：Sin1的计算结果= 3.2结果分析计算（1+9）/5计算结果=2arcsin1的计算结果log2的报错：通过输入的数据与0字符比较，若两者相等，则显示“error”进行报错，结果如下：经过计算，这些结果均与实际结果相吻合，计算器的功能实现的较为完好。第4

27、章 心得体会本次课程设计用MATLAB的GUI接口设计一个简单的计算器，主要对数字及运算“0-9、+、-、×、÷、.、= 、x2 、sqrt、sin、arcsin、log2”等的代码程序的了解，在设计的过程中也遇到不少的问题，通过和同学的讨论，和老师的交流，让我知道了自己的错误和不足，最终顺利地解决了这些问题。这次课程设计，使我进一步加深了对课本知识的了解和掌握，巩固了所学的基本知识，更加体会到了MATLAB功能的丰富，更加深刻的认识了MATLAB，熟练了编程设计。 其中对计算器按键的颜色、大小和排版，使我的思维更加的缜密，让我在以后的工作生活

28、中，得到了思维的锻炼。在以后学习中，我会更加刻苦，以锻炼自己的能力。参考文献【1】刘卫国.MATLAB程序设计与应用M.北京：高等教育出版 【2】郑阿奇.MATLAB实用教程M.北京：电子工业出版社 【3】罗华飞.MATLAB GUI设计学习手记M.北京：北京航空航天大学出版社  【4】张威.MATLAB基础与编程入门M.西安：西安电子科技大学出版社 【5】孙屹.MATLAB通信仿真开发手册M.北京：国防工业出版社附录function varargout = untitled1(varargin)% UNTITLED1 MATLAB

29、code for untitled1.fig% UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing% singleton*.% H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to% the existing singleton*.% UNTITLED1('CALLBACK',hObject,eventData,handles,.) calls the local% function named CALLBAC

30、K in UNTITLED1.M with the given input arguments.% UNTITLED1('Property','Value',.) creates a new UNTITLED1 or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before untitled1_OpeningFcn gets called. An% unrecognized property name o

31、r invalid value makes property application% stop. All inputs are passed to untitled1_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 re

32、sponse to help untitled1 % Last Modified by GUIDE v2.5 28-Dec-2015 15:21:34 % Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, . 'gui_Singleton', gui_Singleton, . 'gui_OpeningFcn', untitled1_OpeningFcn, . 'gui_OutputFcn

33、9;, untitled1_OutputFcn, . 'gui_LayoutFcn', , . 'gui_Callback', );if nargin && ischar(varargin1) gui_State.gui_Callback = str2func(varargin1);end if nargout varargout1:nargout = gui_mainfcn(gui_State, varargin:);else gui_mainfcn(gui_State, varargin:);end% End initialization c

34、ode - DO NOT EDIT % - Executes just before untitled1 is made visible.function untitled1_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 w

35、ith handles and user data (see GUIDATA)% varargin command line arguments to untitled1 (see VARARGIN) % Choose default command line output for untitled1handles.output = hObject; % Update handles structureguidata(hObject, handles); % UIWAIT makes untitled1 wait for user response (see UIRESUME)% uiwait

36、(handles.figure1); % - Outputs from this function are returned to the command line.function varargout = untitled1_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

37、 of MATLAB% handles structure with handles and user data (see GUIDATA) % Get default command line output from handles structurevarargout1 = handles.output; function edit1_Callback(hObject, eventdata, handles)% hObject handle to edit1 (see GCBO)% eventdata reserved - to be defined in a future version

38、 of MATLAB% handles structure with handles and user data (see GUIDATA)% Hints: get(hObject,'String') returns contents of edit1 as text% str2double(get(hObject,'String') returns contents of edit1 as a double % - Executes during object creation, after setting all properties.function ed

39、it1_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 CreateFcns called % Hint: edit controls usually have a white background on Windows.% See ISPC and COMP

40、UTER.if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor') set(hObject,'BackgroundColor','white');end% - Executes on button press in pushbutton1.function pushbutton1_Callback(hObject, eventdata, handles)% hObject handle to

41、 pushbutton1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','1') ;elsetextString =

42、strcat(textString,'1');set(handles.edit1,'String',textString)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

43、structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','2') ;elsetextString =strcat(textString,'2');set(handles.edit1,'String',textString)end% - Executes on but

44、ton 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)textString = get(handles.edit1,'String');

45、if(strcmp(textString,'0')=1) set(handles.edit1,'String','3') ;elsetextString =strcat(textString,'3');set(handles.edit1,'String',textString)end% - Executes on button press in pushbutton5.function pushbutton5_Callback(hObject, eventdata, handles)% hObject handle

46、 to pushbutton5 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','4') ;elsetextStrin

47、g =strcat(textString,'4');set(handles.edit1,'String',textString)end% - 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% handl

48、es structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','5') ;elsetextString =strcat(textString,'5');set(handles.edit1,'String',textString)end% - Executes on

49、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)textString = get(handles.edit1,'String'

50、;);if(strcmp(textString,'0')=1) set(handles.edit1,'String','6') ;elsetextString =strcat(textString,'6');set(handles.edit1,'String',textString)end% - Executes on button press in pushbutton8.function pushbutton8_Callback(hObject, eventdata, handles)% hObject han

51、dle to pushbutton8 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','7') ;elsetextSt

52、ring =strcat(textString,'7');set(handles.edit1,'String',textString)end% - 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% ha

53、ndles structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','8') ;elsetextString =strcat(textString,'8');set(handles.edit1,'String',textString)end% - Executes

54、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)textString = get(handles.edit1,'Stri

55、ng');if(strcmp(textString,'0')=1) set(handles.edit1,'String','9') ;elsetextString =strcat(textString,'9');set(handles.edit1,'String',textString)end % - Executes on button press in pushbutton11.function pushbutton11_Callback(hObject, eventdata, handles)% hO

56、bject 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)textString = get(handles.edit1,'String');if(strcmp(textString,'0')=1) set(handles.edit1,'String','0') ;

57、elsetextString =strcat(textString,'0');set(handles.edit1,'String',textString)end% - 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

58、of MATLAB% handles structure with handles and user data (see GUIDATA)textString = get(handles.edit1,'String');ss=char(textString);l=length(textString);if(ss(l)='+'|ss(l)='-'|ss(l)='*'|ss(l)='/'|ss(l)='.') textString=ss(1:l-1);endtextString =strcat(text

59、String,'.');set(handles.edit1,'String',textString)% - 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 w

60、ith handles and user data (see GUIDATA)if(strcmp(textString,'0')=1) set(handles.edit1,'String','0') ;elsea = strread(textString, '%f');a=0-a;set(handles.edit1,'String',a)end% - Executes on button press in pushbutton14.function pushbutton14_Callback(hObject, ev

61、entdata, 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)textString = get(handles.edit1,'String');ss=char(textString);l=length(textString);if(ss(l)='+'|ss(

62、l)='-'|ss(l)='*'|ss(l)='/'|ss(l)='.') textString=ss(1:l-1);endtextString =strcat(textString,'+');set(handles.edit1,'String',textString)% - Executes on button press in pushbutton15.function pushbutton15_Callback(hObject, eventdata, handles)% hObject handle to pushbutton15 (see GCBO)%