解决排列组合问题的通用算法,自然数得拆分,求最大公约数的算法-permutations and combinations to solve problems common algorithm, and a few in the resolution, the common denominator for the algorithm

排列组合的应用码，自己写的，很简单实用 ，很简单实用-Permutations and combinations of application code, written in their own, very simple and practical