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。

步骤、方法与要求

-10 in the function were ranked from high to low student achievement, and then improve the function, the n ranked from high to low student achievement, ranked according to the function of the style parameters, such as the style is ' a'　ranked in ascending order, style for the ' d'　in descending row. (A: ascending l, d: descending down) the preparation of a number of different functions, so that it can implement different sorting algorithms (3 above), and then write a general-purpose output functions (required to use function pointer as a parameter) can be printed separately in different sorting algorithm results. Procedures, methods and requirements