随机数选择

Question

我有一组随机数和零。我如何从它们中随机选择一个正数，并且有一定概率，比如20％用另一个值替换它，否则保持不变？

Answer 1

伪代码

While Selected Number Is Not A Positive Number
      Select Random Index Between 0 and Size of Array - 1
      If Number at Index is Not Positive then continue to next iteration
      Else
      Generate Random Number Between 0 and 1
      If Random Number is less than 0.2 //20%
          Set Array[selected index] = some other value