建立一个链表，每个节点包括：学号、姓名、性别、年龄。输入一个 年龄，如果链表中的结点所包含的年龄等于此年龄，则将此节点删去。-Establishment of a linked list, each node comprising: Student ID, name, sex, age. Enter an age, if the age of the node list contains equal to this age, this node is omitted.