链表API

#include <iostream>
#include <stdio.h>

using namespace std;

#define size 1000

struct node{

    int num;
    node *next;
    node *pre;

};

node NodeListPool[size];
int index = 0;
node nil;
node *NIL;

void init()
{
    NIL = & nil;
    NIL->next = NIL;
    NIL->pre = NIL;
    NIL->num = -100;

}

node *getNewNode()
{
    return &NodeListPool[index++];
}

void insert(node *target, node *newNode)
{
    newNode->next = target->next;
    newNode->pre = target;
    target->next = newNode;
    newNode->next->pre = newNode;

}

node *search(int key)
{
    node *tmp = NIL->next;
    while(tmp != NIL && tmp ->num != key)
    {
        tmp = tmp -> next;
    }

    return tmp;
}

void deleteNode(node *node)
{
    node->pre->next = node->next;
    node->next->pre = node->pre;
}

int main()
{
    init();
    node *tmpNode = NIL;
    for(int i = 0; i < 100 ;i++)
    {
        int tmp = rand()%100 + 1;
        cout << tmp << endl;
        node *newNode = getNewNode();
        newNode ->num = tmp;
        insert(tmpNode,newNode);
        tmpNode = tmpNode->next;
    }

    cout << "-------------------------------------"<< endl;

    tmpNode = NIL;
    while(tmpNode->next != NIL)
    {
        cout << tmpNode->next->num << endl;
        tmpNode = tmpNode->next;
    }
    return 0;
}