产生随机数的算法产生随机数有多种不同的方法。这些方法被称为随机数发生器。随机数最重要的特性是：它所产生的后面的那个数与前面的那个数毫无关系。 　　真正的随机数是使用物理现象产生的：比如掷钱币、骰子、转轮、使用电子元件的噪音、核裂变等等。这样的随机数发生器叫做物理性随机数发生器，它们的缺点是技术要求比较高。-There are several different ways to generate a random number algorithm to generate random numbers. These methods are known as the random number generator. Random number of the most important features are: it generates behind that number in front of the number of unrelated. Real random number is generated by using the physical phenomena: the toss, dice, wheels, the noise of the electronic components, nuclear fission, and so on. This random number generator is called a physical random number generator, their drawback is the relatively high technical requirements.