typedef struct _NODE 
{ 
  int data; 
  struct _NODE* next; 
}NODE; 
 
typedef struct _HASH_TABLE 
{ 
  NODE* value[10]; 
}HASH_TABLE; 

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

NODE* find_data_in_hash(HASH_TABLE* pHashTbl, int data) 
{ 
  NODE* pNode; 
  if(NULL == pHashTbl) 
    return NULL; 
 
  if(NULL == (pNode = pHashTbl->value[data % 10])) 
    return NULL; 
 
  while(pNode){ 
    if(data == pNode->data) 
      return pNode; 
    pNode = pNode->next; 
  } 
  return NULL; 
} 

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(NULL != pNode->next) 
    pNode = pNode->next; 
 
  pNode->next = (NODE*)malloc(sizeof(NODE)); 
  memset(pNode->next, 0, sizeof(NODE)); 
  pNode->next->data = data; 
  return TRUE; 
} 

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; 
}