MFC/VC++ 绘制正弦曲线

void CMfcDrawingTestDlg::OnBnClickedOk(){double x,y,x0,y0;double pi = 3.14159254;CString sa;CString sx;CString so;double da;double dx;double doo; CEdit* ceA = (CEdit*)GetDlgItem(IDC_TXTA); CEdit* ceX = (CEdit*)GetDlgItem(IDC_TXTX); CEdit* ceO = (CEdit*)GetDlgItem(IDC_TXTO);            ceA->GetWindowTextW(sa);   ceX->GetWindowTextW(sx);   ceO->GetWindowTextW(so);   da = _wtof(sa.GetBuffer());dx = _wtof(sx.GetBuffer());doo = _wtof(so.GetBuffer()); CEdit* ce = (CEdit*)GetDlgItem(IDC_EDIT1);CClientDC dc(ce);CPen* pen = new CPen(PS_SOLID,1,1);CPen* poldPen = dc.SelectObject(pen);for(x = 1;x < 360;x++){x0 = x-1;y0 = da*sin(x0/doo) + dx;////da，振幅，doo， X偏移量  dx， y偏移量y = da*sin(x/doo) + dx;dc.MoveTo(x0,y0);dc.LineTo(x,y);}// TODO: Add your control notification handler code here//OnOK();}void CMfcDrawingTestDlg::OnBnClickedCancel(){Invalidate();////清除// TODO: Add your control notification handler code here//OnCancel();}