#include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct sqlist //单链表结构体 { int data; struct sqlist *next; //指针域 }sqlist; void initlist (sqlist *l, sqlist *m, sqlist *n, sqlist *h) { //todo list yes l->next = null; m->next = null; n->next = null; h->next = null; } void emp(sqlist *l) { if (l->next==null) //todo list)yes printf("链表为空表。\n"); else printf("链表为非空表。\n"); } void length(sqlist *l) { sqlist *p; int length = 0; p=l->next; while(p!=null) { length++; p=p->next; } //todo list

以下是为您补充完整的代码，并添加了一些必要的注释，希望对您有帮助： ```c #include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct sqlist //单链表结构体 { int data; struct sqlist *next; //指针域 }sqlist; // 初始化链表函数 void initlist (sqlist *l, sqlist *m, sqlist *n, sqlist *h) { l->next = NULL; m->next = NULL; n->next = NULL; h->next = NULL; } // 判断链表是否为空函数 void emp(sqlist *l) { if (l->next==NULL) printf("链表为空表。\n"); else printf("链表为非空表。\n"); } // 计算链表长度函数 void length(sqlist *l) { sqlist *p; int length = 0; p = l->next; while(p!= NULL) { length++; p = p->next; } printf("链表长度为：%d\n", length); } int main() { sqlist *head = (sqlist*)malloc(sizeof(sqlist)); initlist(head, NULL, NULL, NULL); emp(head); length(head); free(head); return 0; } ``` [2024-10-23 23:11:22 | AI写代码神器 | 345点数解答]