#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#define M 20
#define NULLDEL -1
#define DELDEY -2

typedef struct
{
	int key;
	int count;
}HashTable;

//创建和插入
void Insert(HashTable ha[], int m, int p, int key)
{
	int i, HO, HI;
	HO = key % p;
	if (ha[HO].key == NULLDEL || ha[HO].key == DELDEY)
	{
		ha[HO].key = key;
		ha[HO].count = 1;
	}
	else
	{
		i = 1;
		do
		{
			HI = (HO + i * i) % m;
			i++;
		} while (ha[HI].key != NULLDEL && ha[HI].key != DELDEY);
		ha[HI].key = key;
		ha[HI].count = i;
	}
}
void Create(HashTable ha[],int m,int n1,int p,int keys[])
{
	int i;
	for (i = 0; i < m; i++)
	{
		ha[i].key = NULLDEL;
		ha[i].count = 0;
	}
	for (i = 0; i < n1; i++)
	{
		Insert(ha, m, p, keys[i]);
	}
	printf("二次探测法哈希表如下:\n");
	for (i = 0; i < m; i++)
	{
		printf("%d  查找次数 %d 次\n", ha[i].key,ha[i].count);
	}
}
//查找
int Search(HashTable ha[], int m, int p, int key)
{
	int HO, HI;
	HO = key % p;
	if (ha[HO].key == NULLDEL)
	{
		ha[HO].count = 1;
		return -1;
	}
	else if (ha[HO].key == key)
	{
		ha[HO].count = 1;
		return HO;
	}
	else
	{
		ha[HO].count = 1;
		for (int i = 0; i < m; i++)
		{
			HI = (HO + i * i) % m;//HO还是那个HO，这里变的是HI和i的值
			if (ha[HI].key == NULLDEL)
			{
				ha->count = ha[HO].count + i;//哈希冲突的次数
				return -1;
			}
			else if (ha[HI].key == key)
			{
				ha->count = ha[HO].count + i;
				return HI;
			}
		}
	}
}
//删除哈希值
bool deleteNode(HashTable ha[], int m, int p, int key)
{
	int HO,i = 1;
	HO = key % p;
	while (ha[HO].key != NULLDEL && ha[HO].key != key)
	{
		HO = (HO + i * i);
		i++;
	}
	if (ha[HO].key == key)
	{
		ha[HO].key = DELDEY;
		return true;
	}
	else
	{
		return false;
	}
}
int main()
{
	HashTable ha[M];
	int keys[] = { 19,14,23,1,68,20,84,27,55,11,10,79 };
	int n1 = sizeof(keys) / sizeof(keys[0]);
	int p = 13;
	Create(ha, M, n1, p, keys);

	int key = 79;
	int result = Search(ha, M, p, key);
	if (result!=-1)
	{
		printf("找到 %d 位置在 %d 哈希冲突 %d 次\n", key, result, ha->count);
	}
	else {
		printf("找不到 %d 哈希冲突 %d 次\n", key, ha->count);
	}
	
	key = 23;
	deleteNode(ha, M, p, key);
	printf("删除 %d 元素后遍历如下:\n", key);
	for (int i = 0; i < M; i++)
	{
		if (ha[i].key != NULLDEL && ha[i].key != DELDEY)
		{
			printf(" %d ", ha[i].key);
		}
		else {
			printf(" * ");
		}
	}
	return 0;
}