数据结构-线性表

#ifndef _SEQLIST_H_
#define _SEQLIST_H_

typedef void SeqList;
typedef void SeqListNode;

/*
    该方法用于创建并且返回一个空的线性表
*/
SeqList* SeqList_Create(int capacity);

/*
    该方法用于销毁一个线性表list
*/
void SeqList_Destroy(SeqList* list);

/*
    该方法用于将一个线性表list中的所有元素清空
    使得线性表回到创建时的初始状态
*/
void SeqList_Clear(SeqList* list);

/*
    该方法用于返回一个线性表list中的所有元素个数
*/
int SeqList_Length(SeqList* list);


int SeqList_Capacity(SeqList* list);

/*
    该方法用于向一个线性表list的pos位置处插入新元素node
    返回值为1表示插入成功，0表示插入失败
*/
int SeqList_Insert(SeqList* list, SeqListNode* node, int pos);

/*
    该方法用于获取一个线性表list的pos位置处的元素
    返回值为pos位置处的元素，NULL表示获取失败
*/
SeqListNode* SeqList_Get(SeqList* list, int pos);

/*
    该方法用于删除一个线性表list的pos位置处的元素
    返回值为被删除的元素，NULL表示删除失败
*/
SeqListNode* SeqList_Delete(SeqList* list, int pos);

#endif

#include <stdio.h>
#include <malloc.h>
#include "SeqList.h"

typedef unsigned int TSeqListNode;

typedef struct _tag_SeqList
{
    int capacity;
    int length;
    TSeqListNode* node;
} TSeqList;

SeqList* SeqList_Create(int capacity) // O(1)
{
    TSeqList* ret = NULL;
    
    if( capacity >= 0 )
    {
        ret = (TSeqList*)malloc(sizeof(TSeqList) + sizeof(TSeqListNode) * capacity);
    }
    
    if( ret != NULL )
    {
        ret->capacity = capacity;
        ret->length = 0;
        ret->node = (TSeqListNode*)(ret + 1);
    }
    
    return ret;
}

void SeqList_Destroy(SeqList* list) // O(1)
{
    free(list);
}

void SeqList_Clear(SeqList* list) // O(1)
{
    TSeqList* sList = (TSeqList*)list;
    
    if( sList != NULL )
    {
        sList->length = 0;
    }
}

int SeqList_Length(SeqList* list) // O(1)
{
    TSeqList* sList = (TSeqList*)list;
    int ret = -1;
    
    if( sList != NULL )
    {
        ret = sList->length;
    }
    
    return ret;
}

int SeqList_Capacity(SeqList* list) // O(1)
{
    TSeqList* sList = (TSeqList*)list;
    int ret = -1;
    
    if( sList != NULL )
    {
        ret = sList->capacity;
    }
    
    return ret;
}

int SeqList_Insert(SeqList* list, SeqListNode* node, int pos) // O(n) 
{
    TSeqList* sList = (TSeqList*)list;
    int ret = (sList != NULL);
    int i = 0;
    
    ret = ret && (sList->length + 1 <= sList->capacity);
    ret = ret && (0 <= pos);
    
    if( ret )
    {
        if( pos >= sList->length )
        {
            pos = sList->length;
        }
        
        for(i=sList->length; i>pos; i--)
        {
            sList->node[i] = sList->node[i-1];
        }
        
        sList->node[i] = (TSeqListNode)node;
        
        sList->length++;
    }
    
    return ret;
}

SeqListNode* SeqList_Get(SeqList* list, int pos) // O(1) 
{
    TSeqList* sList = (TSeqList*)list;
    SeqListNode* ret = NULL;
    
    if( (sList != NULL) && (0 <= pos) && (pos < sList->length) )
    {
        ret = (SeqListNode*)(sList->node[pos]);
    }
    
    return ret;
}

SeqListNode* SeqList_Delete(SeqList* list, int pos) // O(n)
{
    TSeqList* sList = (TSeqList*)list;
    SeqListNode* ret = SeqList_Get(list, pos);
    int i = 0;
    
    if( ret != NULL )
    {
        for(i=pos+1; i<sList->length; i++)
        {
            sList->node[i-1] = sList->node[i];
        }
        
        sList->length--;
    }
    
    return ret;
}

#include <stdio.h>
#include <stdlib.h>
#include "SeqList.h"

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) 
{
    SeqList* list = SeqList_Create(5);
    
    int i = 0;
    int j = 1;
    int k = 2;
    int x = 3;
    int y = 4;
    int z = 5;
    int index = 0;
    
    SeqList_Insert(list, &i, 0);
    SeqList_Insert(list, &j, 0);
    SeqList_Insert(list, &k, 0);
    SeqList_Insert(list, &x, 0);
    SeqList_Insert(list, &y, 0);
    SeqList_Insert(list, &z, 0);
    
    for(index=0; index<SeqList_Length(list); index++)
    {
        int* p = (int*)SeqList_Get(list, index);
        
        printf("%d\n", *p);
    }
    
    printf("\n");
    
    while( SeqList_Length(list) > 0 )
    {
        int* p = (int*)SeqList_Delete(list, 0);
        
        printf("%d\n", *p);
    }
    
    SeqList_Destroy(list);
    
    return 0;
}