在函数中进行 10个学生成绩从高到低排名， 再改进函数， 进行 n个学生成绩从高到低排名, 排名方式根据函数的style参数进行，如style为‘a 按升序排，style为 d 按降序排（ a：ascending 升，d:descending 降）。

编写多个不同函数，使之能实现不同的排序算法（3种以上），再编写一个通用输出函数，（要求用函数指针做参数）能分别打印不同排序算法的结果。

-The function of 10 students from high to low ranking, improved function, n students from high to low ranking, ranked according to function way style parameters such as "a style, style, by ascending　to　d" (in descending, d/a: ascending descending upon:).

Write different function, can achieve different sort algorithm (3 kinds of above), and then write a general output function, (with) function Pointers can do parameters were printed different sort algorithm.