数据结构之__队列

老样子，代码就是一切，首先queueg.h

 1 #ifndef queueg_h
 2 #define queueg_h
 3 
 4 #include <stdio.h>
 5 #include <stdlib.h>
 6 
 7 typedef int DataType;
 8 
 9 typedef struct node_{
10     DataType data;
11     struct node_ *next;
12 } Node;
13 
14 typedef struct list_{
15     Node *head;
16     Node *tail;
17     Node *current;
18 } List;
19 
20 void initList(List *);
21 void inQueue(List *, DataType);
22 void outQueue(List *);
23 Node *frontQueue(List *);
24 int getLength(List *);
25 void dispList(List *);
26 
27 #endif

接着queueg.c

 1 #include "queueg.h"
 2 
 3 void initList(List *list){
 4     list->head = NULL;
 5     list->tail = NULL;
 6     list->current = NULL;
 7 
 8     return;
 9 }
10 
11 void inQueue(List *list, DataType data){
12     //1、创建一个节点
13     Node *node = (Node *)malloc(sizeof(Node));
14     node->data = data;
15     node->next = NULL;
16 
17     //2、插入节点准备
18     if(list->head == NULL){
19         list->head = node;
20     }else{
21         //node->next = list->head;
22         list->tail->next = node;
23     //3、插入节点
24     }
25     list->tail = node;
26 
27     return;
28 }
29 
30 void outQueue(List *list){
31     list->head = list->head->next;
32 
33     return;
34 }
35 
36 Node *frontQueue(List *list){
37     Node *node = (Node *)malloc(sizeof(Node));
38     node = list->head;
39 
40     return node;;
41 }
42 
43 int getLength(List *list){
44     Node *node = (Node*)malloc(sizeof(Node));
45     node = list->head;
46     int i = 0;
47     while(node != NULL){
48         node = node->next;
49         i++;
50     }
51 
52     return i;
53 }
54 
55 void dispList(List *list){
56     Node *node = (Node *)malloc(sizeof(Node));
57     node = list->head;
58     int i = 0;
59     while(node != NULL){
60         printf("the %dth node: %d\n", i + 1, node->data);
61         node = node->next;
62         i++;
63     }
64     printf("display finished\n");
65 
66     return;
67 }

最后，测试代码testQueue.c

 1 #include "queueg.h"
 2 
 3 int main(int argc, char **argv)
 4 {
 5     List *list = (List *)malloc(sizeof(List));
 6     initList(list);
 7     inQueue(list, 4);
 8     inQueue(list, 6);
 9     inQueue(list, 8);
10     inQueue(list, 10);
11     dispList(list);
12     Node *tmp = frontQueue(list);
13     printf("getTop result: %d\n", tmp->data);
14     outQueue(list);
15     dispList(list);
16     outQueue(list);
17     dispList(list);
18     printf("the list: %d\n", getLength(list));
19 
20     return 0;
21 }