Actually, you got one of the best answers available and you didn't take the time to look or you'd have the problem solved by now. Please see the link that Cadavre gave you. It's one of the best answers possible because it shows you how to do this several different ways and the performance ramifications of each.

Don't forget that this "university project" is for a grade and, I for one, expect you to do a little work on your own to earn your grade because, someday, you're going to be on someone's doorstep askig for a job. If it's for a company that I rely on for some service, then I'd really like its empoyees to know what they're doing. 😉