说明：  使用c++语言实现。 大家都知道π=3.1415926……无穷多位, 历史上很多人都在计算这个数, 一直认为是一个非常复杂的问题。现在有了电脑, 这个问题就简单了。 电脑可以利用级数计算出很多高精度的值, 有关级数的问题请参考《高等数学》,以下是比较有名的有关π的级数:
(Use c++ language. We all know that π = 3.1415926 ... ... infinitely many, many people in history in the calculation of this number, has been considered a very complex issue. Now, with computers, this problem is simple. Computer can use the series to calculate the value of many precise, the series of questions refer to the " higher mathematics" , the following is the more famous series of π:)