本程序用VC++6.0编写

double w;

void CLunWenJiSuanQiDlg::OnJiSuanResult() 
{
 
	if(UpdateData()==TRUE)

	w=m_bianliang;
	
    m_result=0.25*w+arctan((0.35*w)/(1+0.65*w*w));
	 
    UpdateData(FALSE);

	
	
}