Link C 中的另一个结构

Question

我正尝试在 C 中完成此数据结构。将另一个结构连接到另一个结构。像这样：

struct room
{
 int roomnumber;
 struct room * nextRoom;
 struct person * personList;
}*top=NULL,*temp=NULL,top1;

struct person
{
 int personnumber;
 struct person *next;
}*node=NULL,temp1;

struct room 有一个指向 struct person 的指针。我很难将它连接到另一个结构。这是正确的吗？

这是我的函数

void insert()
{
    int val;
    printf("enter value: ");
    scanf("%d",&val);
    newnode=create_node(val);
    if(top->personList==NULL)
    {
        top->personList=newnode;
    }
    else
    {
        node->next=newnode;
        node=newnode;


    }
}

插入一个人到房间。房间就像已经创建一样。 create_node() 是执行 malloc()

的人

Answer 1

这是一个不使用全局变量的版本，它使您的函数更加通用和可重用：

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

typedef struct person
{
  int            personNumber;

  struct person *next;

} person;  /* NOTE: this is a typedef, not a global declaration like you did */

typedef struct room
{
  int          roomNumber;
  person      *personList;
  person      *lastInList;

  struct room *nextRoom;

} room;  /* NOTE: this is a typedef, not a global declaration like you did */

person *create_person(int val)
{
  person *ret = calloc(1, sizeof(*ret));

  if (ret)
  {
    ret->personNumber = val;
    ret->next         = NULL;
  }

  return ret;
}

int room_insert(room *r, int val)
{
  person *p = create_person(val);

  if (NULL == p)
    return -1;

  if (NULL != r->personList)
    r->lastInList->next = p;

  else
    r->personList = p;

  r->lastInList = p;

  return 0;
}

int main(int argc, char **argv)
{
  room    my_room       = { 0 };  /* important! initializes pointers to NULL */
  room    my_other_room = { 0 };  /* important! initializes pointers to NULL */
  person *p;

  room_insert(&my_room, 5);
  room_insert(&my_other_room, -5);

  room_insert(&my_room, 10);
  room_insert(&my_other_room, -10);

  room_insert(&my_room, 15);    
  room_insert(&my_other_room, -15);

  for (p = my_room.personList; p; p = p->next)
    printf("%d\n", p->personNumber);

  for (p = my_other_room.personList; p; p = p->next)
    printf("%d\n", p->personNumber);

  return 0;
}

Link C 中的另一个结构

Link another structure in C

c

singly-linked-list