创建一个单向链表，保存输入的学生成绩：

78、90、85、67、98、75、64、80、82、78

创建完成后在75和64之间插入一个成绩90；

然后实现对成绩进行由低到高排序；

最后在链表中找到成绩为80的，并将其删去。

-Create a one-way linked list, save the information entered student achievement: After 78,90,85,67,98,75,64,80,82,78 created between 75 and 64 insert a score 90　then the results were achieved　low to high ranking　and finally found success in the list of 80, and its deletion.