【正文】 )。)。,y1)。（17） 右括號“）”鍵的回調函數(shù)：% 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)%右括號“）”鍵的回調函數(shù)。signs=get(,39。string39。.39。839。639。439。239。039。三、設計步驟： 運行matlab ，進入主界面。二、設計思路：每按下一個數(shù)字鍵或者符號鍵的時候，利用get(,39?？丶傩员砜丶tyle類型TagStringFontSizeFontUnitsFontWeightVisibleBackgroundColorForegroundColorredgreenblueredgreenbluepushbuttonPushbutton1116pointsboldon00110Pushbutton22Pushbutton33Pushbutton44Pushbutton55Pushbutton66Pushbutton77Pushbutton88Pushbutton99pushbutton100pushbutton11＋43pushbutton12－pushbutton13pushbutton14247。set(,39。set(,39。set(,39。set(,39。set(,39。)。signs=get(,39。,strcat(signs,39。string39。String39。（21） Exit鍵的回調函數(shù)：% 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)%Exit鍵的回調函數(shù)。,IconData,IconCMap)。,39。,39。string39。set(,39。*39。（13） 減號“－”鍵的回調函數(shù)：% Executes on button press in pushbutton9.function pushbutton12_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)%減號“－”鍵的回調函數(shù)。string39。string39。string39。string39。string39。string39。)獲取當前輸入文本框edit1的string屬性，然后利用字符串執(zhí)行命令y1=eval(x)計算輸入文本框的表達式，得到的結果是字符型常量；然后利用字符串輸出格式控制函數(shù)y=sprintf(39。string39。（1） 數(shù)字鍵0的回調函數(shù)：% Executes on button press in pushbutton3.function pushbutton10_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)%數(shù)字鍵0的回調函數(shù)：