title: How to create a non-repeating random number?
body: <p>I am trying to create a Bingo Game for an Elderly home. I was able to make one using random number generators that are used to scan an array but the problem is that it takes to long(2 min) to search the array and ensure no doubles are repeated. I did some research and found something called pseudo random in c that does not repeat numbers upon creation. But the code looks very convoluted so I do not feel comfortable taking something that I do not fully understand. Which brings to my question which is there a simple way to create a non-repeating random number generator or a good explanation that could explain one?  </p>