算法程序,里面封装了算法中最常用的排序方法，通过数组和指针的比较列举他们的不同-Algorithm program, which encapsulates the most commonly used method of sorting algorithm to enumerate their different arrays and pointers

T012_枚举排列组合131,关于枚举排列组合的算法-T012_ enumerate permutations 131, permutations and combinations on the enumeration algorithm