Is it human’s words can be trusted?I would like to say that no.This is because people only trust the people’s credibility not the word that come out from them. Just like we all know that the familiar with the wolves and shepherd story. The shepherd lost his sheep because he lie too many that is he lost his credibility to the villager although the wolves is really present.Now i have a question,shall i trust the people’s word or people credibility?I would choose to believe the things that is truth.

the value for the function ‘rand’ is within 0 to 1. So in order to achieve the range within 0~n, we need to write y  = 3*rand. If we want the random value to be integer within the range 0-3, we write it as t = ceil(3*rand).