用MATLAB做的 一个计算器.doc

一、布局GUI。1.打开Matlab，输入Guide 回车或者在工具栏上点击图标出现Guide 窗口：2.然后双击“Blank GUI(Default)”出现GUI窗口3.添加按钮4.根据按钮的作用及视觉效果做一定的修改把按钮的字符串大小、颜色进行设置，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。最终设置的静态文本框为白色，其他按钮均为分红色。5.保存、添加功能函数 把做好的按钮及静态文本框保存后自动弹出Editor的M文本，对然后对相应的pushbutton添加功能函数。以下是相应按钮的功能函数。（1）数字按键编写。在function pushbutton1_Callback(hObject, eventdata, handles）下输入：textString = get(handles.text1,String);textString =strcat(textString,0);set(handles.text1,String,textString)这是使用句柄handles指向对象text1，并以字符串形式来存储数据文本框text1的内容，并存储数个“0”，然后由set(handles.text1,String,textString在text1中输出。同理，分别在function pushbutton210_Callback(hObject, eventdata, handles）下给19数字按键下编写此类程序。（2）.符号键：function pushbutton12_Callback(hObject, eventdata, handles)textString = get(handles.text1,String);textString =strcat(textString,+);set(handles.text1,String,textString)strcat的作用是将两个字符串连接起来，就是在已输入的存储数据textString后添加“+”进行运算。然后执行set(handles.text1,String,textString)。符号键-、*、/与+的运算函数类似。“平方运算”,主要是由“2”功能实现。（3）运算符“=”的编程：textString = get(handles.text1,String);ans =eval(textString);“eval”的作用是将符号表达式转换成数值表达式。再由set(handles.text1,String,ans)输出。（4）按键“back”编程：即显示一个空字符：set(handles.text1,String,) ;按键“back”编程:textString = get(handles.text1,String); set(handles.text1,String,) ; ss=char(textString);n=length(textString);textString=ss(1:w-1);%将w个字符串转成w-1个，即删除了末位字符set(handles.text1,String,textString)（5）按键“清空”：把静态文本框的字符清空，返回一个空格set(handles.text1,String,)（6）按键“退出”:关闭计算器close(gcf);二、计算器的使用加法运算（+）：按“=”后显示平方运算：按“=”后显示附各按键的程序源代码：function pushbutton1_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,0)set(handles.text1,String,textString)function pushbutton2_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,1)set(handles.text1,String,textString)function pushbutton3_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,2)set(handles.text1,String,textString)function pushbutton4_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,3)set(handles.text1,String,textString)function pushbutton5_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,4)set(handles.text1,String,textString)function pushbutton6_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,5)set(handles.text1,String,textString)function pushbutton7_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,6)set(handles.text1,String,textString)function pushbutton8_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,7)set(handles.text1,String,textString)function pushbutton9_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,8)set(handles.text1,String,textString)function pushbutton10_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,9)set(handles.text1,String,textString)function pushbutton11_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,+)set(handles.text1,String,textString)function pushbutton12_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,-)set(handles.text1,String,textString)function pushbutton13_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,*)set(handles.text1,String,textString)function pushbutton14_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,/)set(handles.text1,String,textString)function pushbutton15_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,.)set(handles.text1,String,textString)function pushbutton16_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)s=eval(textString)set(handles.text1,String,s)function pushbutton17_Callback(hObject, eventdata, handles)textString=get(handles.text1,String)textString=strcat(textString,2)set(handles.text1,String,textString)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)textString=get(handles.text1,String)w=length(textString)t=char(textString)textString=t(1:w-1)set(handles.text1,String,textString)function pushbutton19_Callback(hObject, eventdata, handles)set(handles.text1,String,)function