cでHASH表の作成、挿入、検索、削除、印刷を実現する(達人の指摘を歓迎する)


/************************************************************************
 c  HASH   、  、  、  、  ,         ,      !              ,
    !!!
                       :
Email:[email protected]
Thanks!
************************************************************************/
#include <stdio.h>
#include <STDLIB.H>
#include <MEMORY.H>

#define STATUS int
#define FALSE 0
#define TRUE 1
#define VOID void

/****************************************
a)  hash          
*****************************************/
typedef struct _Node
{
	int data;
	struct _Node *next;
}NODE;

typedef struct _HASH_TABLE
{
	NODE * value[10];
}HASH_TABLE;


/****************************************
b)  hash 
*****************************************/
HASH_TABLE * create_hash_table()
{
	HASH_TABLE* pHashTbl = (HASH_TABLE*)malloc(sizeof(HASH_TABLE));
	memset(pHashTbl,0,sizeof(HASH_TABLE));
	return pHashTbl;
}


/****************************************
c) hash       
*****************************************/
NODE * find_data_in_hash(HASH_TABLE* pHashTbl,int data)
{
	NODE* pNode;
	if (NULL == pHashTbl)
	{
		return NULL;
	}

	/*  HASH   , NULL     NULL*/
	if (NULL == (pNode = pHashTbl->value[data%10]))
	{
		return NULL;
	}

	/*              */
	while(pNode)
	{
		if ( data == pNode->data)
		{
			/*           */
			return pNode;
		}
		/*      ,      */
		pNode = pNode->next;
	}

	/*     NULL,          */
	//return NULL;
}

/****************************************
d) hash       
*****************************************/
STATUS insert_data_into_hash(HASH_TABLE* pHashTbl,int data)
{
	NODE* pNode;
	if (NULL == pHashTbl)
	{
		return FALSE;
	}

	if (NULL == pHashTbl->value[data%10])
	{
		pNode = (NODE*)malloc(sizeof(NODE));
		memset(pNode,0,sizeof(NODE));
		pNode->data = data;
		pHashTbl->value[data%10] = pNode;

		return TRUE;
	}

	if (NULL == find_data_in_hash(pHashTbl,data))
	{
		return FALSE;
	}

	pNode = pHashTbl->value[data%10];
	while(pNode->next)
	{
		pNode = pNode->next;
	}

	pNode->next = (NODE*)malloc(sizeof(NODE));
	memset(pNode->next,0,sizeof(NODE));
	pNode->next->data = data;

	return TRUE;
}

/****************************************
 e) hash      
*****************************************/
STATUS delete_data_from_hash(HASH_TABLE* pHashTbl,int data)
{
	NODE* pHead;
	NODE* pNode;

	if (NULL == pHashTbl || NULL == pHashTbl->value[data%10])
	{
		return FALSE;
	}

	if (NULL == (pNode = find_data_in_hash(pHashTbl,data)))
	{
		return FALSE;
	}

	if (pNode == pHashTbl->value[data%10])
	{
		pHashTbl->value[data%10] = pNode->next;
		goto final;
	}

	pHead = pHashTbl->value[data%10];
	
	while(pNode != pHead->next)
	{
		pHead = pHead->next;
	}

	pHead->next = pNode->next;

final:
	free(pNode);
	return TRUE;
}


/****************************************
 f)  hash      
  :
 [Hash idx]     [value]
 0-------------NULL
 1-------------1 251
 2-------------22
 3-------------123 43
 4-------------NULL
 5-------------55 15 235 525 725 275 545
 6-------------NULL
 7-------------257
 8-------------NULL
*****************************************/
VOID print_hash_data(HASH_TABLE* pHashTbl)
{
	NODE* pNode;
	int i=0;
	if (NULL == pHashTbl)
	{
		printf("ERROR:The hash is NULL
"); } /* if (NULL == (pNode = pHashTbl->value[10])) { printf("ERROR:The hash node is NULL
"); } */ printf("[Hash idx] [value]
"); do { printf(" %d-------------",i); if (NULL == pHashTbl->value[i]) { i++; printf("NULL
"); continue; } pNode = pHashTbl->value[i]; while(pNode) { printf("%d ",pNode->data); pNode = pNode->next; } printf("
"); i++; } while (i<10); printf("
"); } int main() { HASH_TABLE* pHashTbl = create_hash_table(); (VOID)insert_data_into_hash(pHashTbl,22); (VOID)insert_data_into_hash(pHashTbl,22); (VOID)insert_data_into_hash(pHashTbl,123); (VOID)insert_data_into_hash(pHashTbl,436); (VOID)insert_data_into_hash(pHashTbl,55); (VOID)insert_data_into_hash(pHashTbl,157); (VOID)insert_data_into_hash(pHashTbl,235); (VOID)insert_data_into_hash(pHashTbl,256); (VOID)insert_data_into_hash(pHashTbl,525); (VOID)insert_data_into_hash(pHashTbl,724); (VOID)insert_data_into_hash(pHashTbl,278); (VOID)insert_data_into_hash(pHashTbl,209); (VOID)insert_data_into_hash(pHashTbl,67); (VOID)insert_data_into_hash(pHashTbl,54); (VOID)insert_data_into_hash(pHashTbl,546); (VOID)insert_data_into_hash(pHashTbl,350); (VOID)insert_data_into_hash(pHashTbl,101); (VOID)insert_data_into_hash(pHashTbl,23); print_hash_data(pHashTbl); (VOID)delete_data_from_hash(pHashTbl,55); print_hash_data(pHashTbl); return 0; }