c - C语言链表中的节点

Question

我开始学习链表，所以我的问题可能很愚蠢:p。我注意到在所有练习中，它们只在节点中获取一个数据元素(如下所示:int data)。所以我想问我们是否可以在一个节点中定义多个数据元素。否则为什么不呢？

#include <stdio.h>
#include <stdlib.h>

struct node {
    int data;
    struct node* nextptr;
};

struct node* BuildList()
{
  /* initialize node's pointers */
  struct node* head = NULL;
  struct node* second = NULL;
  struct node* third = NULL;
  /* allocate three nodes in the heap*/
  head = malloc(sizeof(struct node));
  second = malloc(sizeof(struct node));
  third = malloc(sizeof(struct node));
  /* setup first node */
  head->data = 1;
  head->nextptr = second;

  second->data = 2;
  second->nextptr = third;
  third->data =3;
  third->nextptr = NULL;

  return head;
}

Answer 1

是的，int 只是让示例变得更容易。但在现实生活中，节点将是更有用的东西。示例:

struct chair {
    int nr_or_legs;
    int weight_in_kg;
    int height_in_cm;
};

struct chair_node {
    struct chair data;
    struct chair_node* nextptr;
};

或者只是:

struct chair_node {
    int nr_or_legs;
    int weight_in_kg;
    int height_in_cm;
    struct chair_node* nextptr;
};