编一个冒泡排序的成员函数模板实现降序排序。可用小于比较，冒泡采用从上往下；也可用大于比较，冒泡采用从下往上。-Compiled a bubble sort member function templates in descending order. Available less than a bubbling using from top to bottom　can also be used more than, bubbling from the bottom up.