精心编写的带有4个基本算法的程序，能加深大家对希尔排序、冒泡排序、快速排序、选择排序的理解，并清楚其中的区别，以及算法优劣性-Carefully prepared with a basic algorithm for four procedures, to strengthen the U.S. on the Hill sort, bubble sort, quick sort, selection sort of understanding, and clearly one of the distinction, as well as the advantages and disadvantages of algorithm