使用linux中標準的queue.h頭文件插件鏈表，隊列，循環隊列

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/queue.h>


int test_list()
{
    LIST_HEAD(listhead, entry) head;
    struct listhead *headp;                 /* List head. */
    struct entry {
        char name[64];
        char sexy[8];
        int age;
        LIST_ENTRY(entry) entries;          /* List. */
    } *n1, *n2, *np;


    LIST_INIT(&head);                       /* Initialize the list. */


    n1 = malloc(sizeof(struct entry));      /* Insert at the head. */
    strcpy(n1->name,"Tom");
    strcpy(n1->sexy,"boy");
    n1->age = 25;
    LIST_INSERT_HEAD(&head, n1, entries);


    n2 = malloc(sizeof(struct entry));      /* Insert after. */
    strcpy(n2->name,"Hameimei");
    strcpy(n2->sexy,"girl");
    n2->age = 23;
    LIST_INSERT_AFTER(n1, n2, entries);
    /* Forward traversal. */
    for (np = head.lh_first; np != NULL; np = np->entries.le_next)
    {
        printf("%s %s %d\n",np->name,np->sexy,np->age);
    }


    while (head.lh_first != NULL)           /* Delete. */
    LIST_REMOVE(head.lh_first, entries);
    return 0;
}


int test_queue()
{
    TAILQ_HEAD(tailhead, entry) head;
    struct tailhead *headp;                 /* Tail queue head. */
    struct entry {
        char name[64];
        char sexy[8];
        int age;
        TAILQ_ENTRY(entry) entries;         /* Tail queue. */
    } *n1, *n2, *n3,*np;


    TAILQ_INIT(&head);                      /* Initialize the queue. */


    n1 = malloc(sizeof(struct entry));      /* Insert at the head. */
    strcpy(n1->name,"Tom");
    strcpy(n1->sexy,"boy");
    n1->age = 25;
    TAILQ_INSERT_HEAD(&head, n1, entries);


    n2 = malloc(sizeof(struct entry));      /* Insert at the tail. */
    strcpy(n2->name,"Jim");
    strcpy(n2->sexy,"boy");
    n2->age = 24;
    TAILQ_INSERT_TAIL(&head, n2, entries);


    n3 = malloc(sizeof(struct entry));      /* Insert after. */
    strcpy(n3->name,"Hameimei");
    strcpy(n3->sexy,"girl");
    n3->age = 22;
    TAILQ_INSERT_AFTER(&head, n1, n3, entries);


    /* Forward traversal. */
    for (np = head.tqh_first; np != NULL; np = np->entries.tqe_next)
        printf("%s %s %d\n",np->name,np->sexy,np->age);
    /* Delete. */
    while (head.tqh_first != NULL)
    TAILQ_REMOVE(&head, head.tqh_first, entries);


    return 0;
}


int test_circular()
{
    CIRCLEQ_HEAD(circleq, entry) head;
    struct circleq *headp;              /* Circular queue head. */
    struct entry {
        char name[64];
        char sexy[8];
        int age;
        CIRCLEQ_ENTRY(entry) entries;   /* Circular queue. */
    } *n1, *n2, *n3,*n4,*np;


    CIRCLEQ_INIT(&head);                /* Initialize the circular queue. */


    n1 = malloc(sizeof(struct entry));  /* Insert at the head. */
    strcpy(n1->name,"Tom");
    strcpy(n1->sexy,"boy");
    n1->age = 25;
    CIRCLEQ_INSERT_HEAD(&head, n1, entries);


    n2 = malloc(sizeof(struct entry));  /* Insert at the tail. */
    strcpy(n2->name,"Jim");
    strcpy(n2->sexy,"boy");
    n2->age = 24;
    CIRCLEQ_INSERT_TAIL(&head, n2, entries);


    n3 = malloc(sizeof(struct entry));  /* Insert after. */
    strcpy(n3->name,"Hameimei");
    strcpy(n3->sexy,"girl");
    n3->age = 22;
    CIRCLEQ_INSERT_AFTER(&head, n1, n3, entries);


    n4 = malloc(sizeof(struct entry));  /* Insert before. */
    strcpy(n4->name,"Lilei");
    strcpy(n4->sexy,"boy");
    n4->age = 30;
    CIRCLEQ_INSERT_BEFORE(&head, n1, n4, entries);
    /* Forward traversal. */
    printf("Forward traversal.\n");
    for (np = head.cqh_first; np != (void *)&head;
         np = np->entries.cqe_next)
        printf("%s %s %d\n",np->name,np->sexy,np->age);
    /* Reverse traversal. */
    printf("Reverse traversal.\n");
    for (np = head.cqh_last; np != (void *)&head; np = np->entries.cqe_prev)
        printf("%s %s %d\n",np->name,np->sexy,np->age);
    /* Delete. */
    while (head.cqh_first != (void *)&head)
    CIRCLEQ_REMOVE(&head, head.cqh_first, entries);
}


int main(int argc, char *argv[])
{
    printf("Test list...\n");
    test_list();
    printf("________________________\n");
    printf("Test queue...\n");
    test_queue();
    printf("________________________\n");
    printf("Test circular...\n");
    test_circular();
    printf("________________________\n");


    return 0;

}

Test list...
Tom boy 25
Hameimei girl 23
________________________
Test queue...
Tom boy 25
Hameimei girl 22
Jim boy 24
________________________
Test circular...
Forward traversal.
Lilei boy 30
Tom boy 25
Hameimei girl 22
Jim boy 24
Reverse traversal.
Jim boy 24
Hameimei girl 22
Tom boy 25
Lilei boy 30
________________________