单链表操作，从键盘输入任意的5个数，生成一个有序单链表-Single-linked list operation, from the keyboard input any number of 5 to generate an ordered singly linked list

用单链表实现优先级队列，编写实现队列的下列操作的函数并实现书上的进程调度应用. -Realization of the priority queue with a single linked list, prepared to achieve the following functions of the queue and process scheduling application book.