把数组中的n个双字型元素按从大到小的顺序排列。增加一个交换标志，在排序完成时不再执行多余的外层循环
N the array by dual-shaped elements in order from largest to smallest. Add a switch signs in order to complete the implementation of redundant when the outer loop is no longer (2011-01-16, Visual Basic, 1KB, 下载18次)