在 C 中查找循环链表的大小
实现
该算法的实现如下 −
#include <stdio.h> #include <stdlib.h> struct node { int data; struct node *next; }; struct node *head = NULL; struct node *current = NULL; //在第一个位置插入链接 void insert(int data) { // 为新节点分配内存; struct node *link = (struct node*) malloc(sizeof(struct node)); link->data = data; link->next = NULL; // 如果 head 为空,则创建新列表 if(head==NULL) { head = link; head->next = link; return; } current = head; // 移至列表末尾 while(current->next != head) current = current->next; // 在列表末尾插入链接 current->next = link; // Link the last node back to head link->next = head; } //显示列表 void list_size(struct node *list) { int size = 0; if(head==NULL) { printf("List size : %d ", size); return; } current = head; size = 1; while(current->next != head) { current = current->next; size++; } printf("List size : %d ", size); } int main() { insert(10); insert(20); insert(30); insert(1); insert(40); insert(56); list_size(head); return 0; }
输出
程序的输出应为 −
List size : 6
linked_list_programs_in_c.html