MFC中两种方法获取系统时间

void CMFC2Dlg::OnBnClickedButton1()
{
	// TODO: 在此添加控件通知处理程序代码

	CTime t = CTime::GetCurrentTime();
	int nYear=t.GetYear();
	int nMonth=t.GetMonth();
	int nDay = t.GetDay();
	int nHour =t.GetHour();
	int nMin=t.GetMinute();
	int nSec=t.GetSecond();
	int nWeek=t.GetDayOfWeek();
	CString str;
	str.Format("当前时间是:%02d年%02d月%02d日 %02d:%02d:%02d",nYear,nMonth,nDay,nHour,nMin,nSec);
//	AfxMessageBox(str);
	this ->SetWindowText(str);
}


void CMFC2Dlg::OnBnClickedButton2()
{
	// TODO: 在此添加控件通知处理程序代码
	time_t tt=time(NULL);
	tm *pTime=localtime(&tt);
	int nYear=pTime->tm_year+1900;
	int nMonth=pTime->tm_mon+1;
	int nDay = pTime->tm_yday;
	int nHour =pTime->tm_hour;
	int nMin=pTime->tm_min;
	int nSec=pTime->tm_sec;
	CString str;
	str.Format("         当前时间是:%02d年%02d月%02d日 %02d:%02d:%02d",nYear,nMonth,nDay,nHour,nMin,nSec);
//	AfxMessageBox(str);
	this ->SetWindowText(str);
}