数据平滑，使用按箱平均值平滑法对以上数据进行平滑，箱的深度为3。

(b) 使用按箱中值平滑法对以上数据进行平滑，箱的深度为3。

(c) 使用按箱边界值平滑法对以上数据进行平滑，箱的深度为3。

提示：（1）使用链表，不使用数组。（2）数据放入一个数据文件中，不从键盘输入。-Data smoothing, use according to the box to the above average smoothing data smooth, the depth of the box for 3.

(b) use median smoothing method according to the box to the above data smooth, the depth of the box for 3.

(c) use according to the box the boundary value to the above data smoothing, smooth, the depth of the box for 3.

Tip: (1) using linked list, do not use an array. (2) data in a data file, not from the keyboard.