工作总结：检查字符串合法性(C++)

BOOL CLiftCtrlModbusConfigDlg::CheckValid(const CString &str)

{

 ASSERT(str.GetLength() > 0);

 if ((str[0] == '-' && str[1] > '0' && str[1] <= '9')|| (str[0] > '0' && str[0] <= '9' && str.GetLength() >= 1) || (str[0] == '0' && str.GetLength() == 1))

 {

  for (int i = 1; i < str.GetLength(); i++)

  {

   if(!isdigit(str[i]))

   {

    return FALSE;

   }

  }

  return TRUE;

 }

 return FALSE;

}