#ifndef _SEQLIST_H_#define _SEQLIST_H_typedef void SeqList;typedef void SeqListNode;SeqList* SeqList_Create(int capacity);void SeqList_Destroy(SeqList* list);void SeqList_Clear(SeqList* list);int SeqList_Length(SeqList* list);int SeqList_Capacity(SeqList* list);int SeqList_Insert(SeqList* list, SeqListNode* node, int pos);SeqListNode* SeqList_Get(SeqList* list, int pos);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;}