MFC方便cout控制台输出函数

void COJServerDlg::EditPrint(char* buf)
{
CString cstr_buf(buf);
CString cstr_huanhang("\r\n");
m_edit_str_system = m_edit_str_system+cstr_buf+cstr_huanhang;
int len = m_edit_ctl_system.GetWindowTextLength();
if(len > INT_MAX/10*9)//len太大，不再保存
{
m_edit_str_system = cstr_buf;
}
m_edit_ctl_system.SetWindowText(m_edit_str_system);
m_edit_ctl_system.SetScrollPos(SB_VERT,len,TRUE);
m_edit_ctl_system.UpdateWindow();
}