编写建立一个由单链表组织存储的整数序列的程序，链表中每个结点存储一个整型数值，以此为基础完成将整数b插入到该链表中第一个数值为a的结点之前的程序。 -The preparation of the establishment of a single list organized sequence of integers stored procedures, linked list in each node stores an integer value as a basis for the com