说明：  一个计算圆周率的自编程序（带原码）。可以计算40000位以内的圆周率。经过充分优化，速度非常快。 开发平台：turbo-pascal 7.0， 嵌入汇编。
(a calculation of the ratio of circumference wrote (with the original code). 40,000 can be calculated within the pi. After full optimization, speed very quickly. Platform : turbo-pascal 7.0, embedded in the compilation.)