c - 从链表更新数据

Question

我正在为一个项目制作一些链表。我已经编写了一个添加列表

t_team *add_team(t_team *teams, char *team_name, int id)
{
  t_team *tmp;

  if ((tmp = malloc(sizeof(t_team))) == NULL)
    return (NULL);

  if ((tmp->name = malloc(sizeof(char) * strlen(team_name) + 1)) == NULL)
    return (NULL);

  strcpy(tmp->name, team_name);
  tmp->id = id;
  tmp->next = teams;
  return (tmp);
}

但是我需要更新列表中一个特定节点的 ID，我该怎么做？谢谢

Answer 1

第 1 步:找到您要更新的列表

t_team *find_by_name(t_team *head, char *team_name)
{
  t_team * tmp = head;
  while(tmp != NULL){
    if(strcmp(tmp->name, team_name) != 0)
      head = tmp->next; //Advance the pointer to next element
    else
      return tmp;
  }
  return NULL;
}

第 2 步:更新字段
从您的主要功能调用此实用程序:-

  t_team *tmp = find_by_name(head, "Some_Name");
  if( tmp == NULL)
    //element not found
  else
     tmp->id = new_id; //Update ID

更新:- 更新了 find_by_name 以使用 tmp 而不是修改 head