把秒换成时间显示

CString getTimefromSec(int sec)
{

 int second = sec;
 int hour, minute;

 hour = second / 3600;
 second = second - hour * 3600;
 minute = second / 60;
 second = second -minute * 60;

 CString strhour, strmin, strsec;
 if (hour < 10)
  strhour.Format(TEXT("0%d"), hour);
 else
  strhour.Format(TEXT("%d"), hour);

 if (minute < 10)
  strmin.Format(TEXT("0%d"), minute);
 else
  strmin.Format(TEXT("%d"), minute);

 if (second < 10)
  strsec.Format(TEXT("0%d"), second);
 else
  strsec.Format(TEXT("%d"), second);

 CString strDuration;
 strDuration = strhour + TEXT(":") + strmin + TEXT(":") + strsec;

 return strDuration;

}