C++程序設(shè)計(jì)語(yǔ)言揣錦華VisualC++環(huán)境下Windows

1、 ID 變量變量類型IDC_ITEM1_EDITm_Item1_EditCEditIDC_ITEM2_EDITm_Item2_EditCEditIDC_RESULT_EDITm_Result_EditCstring (2) 給“+”按鈕連接代碼。在“+”按鈕上單擊鼠標(biāo)右鍵，選擇ClassWizard菜單項(xiàng)，在彈出的對(duì)話框中選擇Messages Maps選項(xiàng)卡，在Object IDs列表框中選擇IDC_ADD_BUTTON，在Messages列表框中選擇BN_CLICKED項(xiàng)，即選擇單擊按鈕事件，如圖11-11所示。圖11-9 MFC ClassWizard對(duì)話框中Member Variable

2、s選項(xiàng)卡 圖11-10 編輯框連接變量對(duì)話框 單擊右邊的Add Function按鈕，在彈出的對(duì)話框中接受默認(rèn)的名字。單擊Edit Code按鈕，此時(shí)顯示源代碼文件。在函數(shù)OnAddButton( )函數(shù)中輸入下列代碼： void CMy11_1Dlg:OnAddButton( ) / TODO: Add your control notification handler code here char cstrItem110,cstrItem210; double dfItem1,dfItem2,dfResult; char cBuffer50;m_Item1_Edit.GetWindowTe

3、xt(cstrItem1,10);m_Item2_Edit.GetWindowText(cstrItem2,10);dfItem1=atof(LPCTSTR)cstrItem1);dfItem2=atof(LPCTSTR)cstrItem2);dfResult=dfItem1+dfItem2;_gcvt(dfResult,10,cBuffer);m_Result_Edit=(LPCTSTR)cBuffer;UpdateData(FALSE); 圖11-11 “+”按鈕連接代碼對(duì)話框 (3) 同樣可以給“-”、“*”和“/”按鈕連接代碼。不同的是，在消息映像函數(shù)中執(zhí)行減、乘和除的操作。 “減”的

4、操作代碼如下： void CMy11_1Dlg:OnDifferenceButton( ) / TODO: Add your control notification handler code here char cstrItem110,cstrItem210; double dfItem1,dfItem2,dfResult; char cBuffer50;m_Item1_Edit.GetWindowText(cstrItem1,10);m_Item2_Edit.GetWindowText(cstrItem2,10);dfItem1=atof(LPCTSTR)cstrItem1);dfItem

5、2=atof(LPCTSTR)cstrItem2);dfResult=dfItem1-dfItem2;_gcvt(dfResult,10,cBuffer);m_Result_Edit=(LPCTSTR)cBuffer;UpdateData(FALSE); “*”的操作代碼如下： void CMy11_1Dlg:OnMultiplyButton( ) / TODO: Add your control notification handler code herechar cstrItem110,cstrItem210;double dfItem1,dfItem2,dfResult;char cBu

6、ffer50;m_Item1_Edit.GetWindowText(cstrItem1,10);m_Item2_Edit.GetWindowText(cstrItem2,10);dfItem1=atof(LPCTSTR)cstrItem1);dfItem2=atof(LPCTSTR)cstrItem2); dfResult=dfItem1*dfItem2;_gcvt(dfResult,10,cBuffer);m_Result_Edit=(LPCTSTR)cBuffer;UpdateData(FALSE); “/”的操作代碼如下： void CMy11_1Dlg:OnDevideButton(

7、) / TODO: Add your control notification handler code here char cstrItem110,cstrItem210;double dfItem1,dfItem2,dfResult;char cBuffer50;m_Item1_Edit.GetWindowText(cstrItem1,10);m_Item2_Edit.GetWindowText(cstrItem2,10);dfItem1=atof(LPCTSTR)cstrItem1);dfItem2=atof(LPCTSTR)cstrItem2);dfResult=dfItem1/dfI

8、tem2;_gcvt(dfResult,10,cBuffer);m_Result_Edit=(LPCTSTR)cBuffer;UpdateData(FALSE); (4) 給Clear按鈕連接代碼。利用ClassWizard將按鈕消息BN_CLICKED加到函數(shù)OnClearButton中，加入下列代碼: void CMy11_1Dlg:OnClearButton( ) / TODO: Add your control notification handler code here m_Item1_Edit.SetSel(0, -1); m_Item1_Edit.ReplaceSel( ); (5) 同理，利用ClassWizard給Exit按鈕連接下列