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本文實例講述了C語言實現的雙鏈表功能。分享給大家供大家參考，具體如下：
Dlist.h
#ifndef __DLIST_H__
#define __DLIST_H__
#include<cstdio>
#include<malloc.h>
#include<assert.h>
typedef int ElemType;
typedef struct Node {
ElemType data;
struct Node *prio;
struct Node *next;
}Node,*PNode;
typedef struct List {
PNode first;
PNode last;
size_t size;
}List;
void InitDlist(List *list);//初始化雙鏈表
void push_back(List *list, ElemType x);//在雙鏈表的末尾插入元素
void push_front(List *list, ElemType x);//在雙鏈表的頭部插入元素
void show_list(List *list);//打印雙鏈表
void pop_back(List *list);//刪除雙鏈表的最后一個元素
void pop_front(List *list);//刪除雙鏈表的第一個元素
void insert_val(List *list, ElemType val);//將數據元素插入到雙鏈表中（要求此時雙鏈表中的數據元素順序排列）
Node* find(List *list, ElemType x);//查找雙鏈表中數據值為x的結點
int length(List *list);//求雙鏈表的長度
void delete_val(List *list, ElemType x);//按值刪除雙鏈表中的某個數據元素
void sort(List *list);//對雙鏈表進行排序
void reverse(List *list);//逆置雙鏈表
void clear(List *list);//清除雙鏈表
void destroy(List *list);//摧毀雙鏈表
//優化
Node* _buynode(ElemType x);//創建結點
#endif
Dlist.cpp
#include"Dlist.h"
Node* _buynode(ElemType x) {
Node *s = (Node*)malloc(sizeof(Node));
assert(s != NULL);
s->data = x;
s->prio = s->next = NULL;
return s;
}
void InitDlist(List *list) {
Node *s = (Node*)malloc(sizeof(Node));
assert(s != NULL);
list->first = list->last = s;
list->first->prio = NULL;
list->last->next = NULL;
list->size = 0;
}
void push_back(List *list, ElemType x) {
Node *s = _buynode(x);
s->prio = list->last;
list->last->next = s;
list->last = s;
list->size++;
}
void push_front(List *list,ElemType x) {
Node *s = _buynode(x);
if (list->first == list->last) {
s->prio = list->first;
list->first->next = s;
list->last = s;
}
else {
s->next = list->first->next;
s->next->prio = s;
s->prio = list->first;
list->first->next = s;
}
list->size++;
}
void show_list(List *list) {
Node *p = list->first->next;
while (p != NULL) {
printf("%d->", p->data);
p = p->next;
}
printf("Nul.\n");
}
void pop_back(List *list) {
if (list->size == 0) return;
Node *p = list->first;
while (p->next != list->last)
p = p->next;
free(list->last);
list->last = p;
list->last->next = NULL;
list->size--;
}
void pop_front(List *list) {
if (list->size == 0) return;
Node *p = list->first->next;
if (list->first->next == list->last) {
list->last = list->first;
list->last->next = NULL;
}
else {
list->first->next = p->next;
p->next->prio = list->first;
}
free(p);
list->size--;
}
void insert_val(List *list, ElemType x) {
Node *p = list->first;
while (p->next != NULL && p->next->data < x)
p = p->next;
if (p->next == NULL)
push_back(list, x);
else {
Node *s = _buynode(x);
s->next = p->next;
s->next->prio = s;
s->prio = p;
p->next = s;
list->size++;
}
}
Node* find(List *list, ElemType x) {
Node *p = list->first->next;
while (p!=NULL && p->data != x)
p = p->next;
return p;
}
int length(List *list) {
return list->size;
}
void delete_val(List *list, ElemType x) {
if (list->size == 0) return;
Node *p = find(list, x);
if (p == NULL) {
printf("要刪除的數據不存在！\n");
return;
}
if (p == list->last) {
list->last = p->prio;
list->last->next = NULL;
}
else {
p->next->prio = p->prio;
p->prio->next = p->next;
}
free(p);
list->size--;
}
void sort(List *list) {
if (list->size == 0 || list->size == 1) return;
Node *s = list->first->next;
Node *q = s->next;
list->last = s;
list->last->next = NULL;
while (q != NULL) {
s = q;
q = q->next;
Node *p = list->first;
while (p->next != NULL && p->next->data < s->data)
p = p->next;
if (p->next == NULL) {
s->next = NULL;
s->prio = list->last;
list->last->next = s;
list->last = s;
}
else {
s->next = p->next;
s->next->prio = s;
s->prio = p;
p->next = s;
}
}
}
void reverse(List *list) {
if (list->size == 0 || list->size == 1) return;
Node *p = list->first->next;
Node *q = p->next;
list->last = p;
list->last->next = NULL;
while (q != NULL) {
p = q;
q = q->next;
p->next = list->first->next;
p->next->prio = p;
p->prio = list->first;
list->first->next = p;
}
}
void clear(List *list) {
if (list->size == 0) return;
Node *p = list->first->next;
while (p != NULL) {
if (p == list->last) {
list->last = list->first;
list->last->next = NULL;
}
else {
p->next->prio = p->prio;
p->prio->next = p->next;
}
free(p);
p = list->first->next;
}
list->size = 0;
}
void destroy(List *list) {
clear(list);
free(list->first);
list->first = list->last = NULL;
}
main.cpp
#include "Dlist.h"
void main() {
List mylist;
InitDlist(&mylist);
ElemType item;
Node *p = NULL;
int select = 1;
while (select) {
printf("*******************************************\n");
printf("*[1] push_back [2] push_front *\n");
printf("*[3] show_list [4] pop_back *\n");
printf("*[5] pop_front [6] insert_val *\n");
printf("*[7] find [8] length *\n");
printf("*[9] delete_val [10] sort *\n");
printf("*[11] reverse [12] clear *\n");
printf("*[13*] destroy [0] quit_system *\n");
printf("*******************************************\n");
printf("請選擇：>>");
scanf("%d", &select);
if (select == 0) break;
switch (select) {
case 1:
printf("請輸入要插入的數據（-1結束）:>");
while (scanf("%d", &item), item != -1) {
push_back(&mylist, item);
}
break;
case 2:
printf("請輸入要插入的數據（-1結束）:>");
while (scanf("%d", &item), item != -1) {
push_front(&mylist, item);
}
break;
case 3:
show_list(&mylist);
break;
case 4:
pop_back(&mylist);
break;
case 5:
pop_front(&mylist);
break;
case 6:
printf("請輸入要插入的數據:>");
scanf("%d", &item);
insert_val(&mylist, item);
break;
case 7:
printf("請輸入要查找的數據:>");
scanf("%d", &item);
p = find(&mylist, item);
if (p == NULL)
printf("要查找的數據在單鏈表中不存在！\n");
break;
case 8:
printf("單鏈表的長度為%d\n", length(&mylist));
break;
case 9:
printf("請輸入要刪除的值:>");
scanf("%d", &item);
delete_val(&mylist, item);
break;
case 10:
sort(&mylist);
break;
case 11:
reverse(&mylist);
break;
case 12:
clear(&mylist);
break;
//case 13:
//destroy(&mylist);
//break;
default:
printf("選擇錯誤,請重新選擇！\n");
break;
}
}
destroy(&mylist);
}
希望本文所述對大家C語言程序設計有所幫助。
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