C++哈希表实现_c++ 哈希表源码

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
 
#define HASHLENGTH 10
 
struct node
{
	int data;
	struct node *next;
};
struct node hash[HASHLENGTH];
typedef struct node * HashNode;
 
int Hash(int k)
{
	return k%HASHLENGTH;
}
 
void CreateHash()
{
	for(int i=0; i<HASHLENGTH; i++)
	{
		hash[i].data = i;
		hash[i].next = NULL;
	}
}
void PrintOneLink(struct node h)
{
	HashNode ptr = h.next;
	while(ptr != NULL)
	{
		printf("%d ", ptr->data);
		ptr = ptr->next;
	}
	printf("\n");
}
 
void PrintHash()
{
	for(int i=0; i<HASHLENGTH; i++)
	{
		printf("hash[%d]:", i);
		PrintOneLink(hash[i]);
	}
}
 
bool SearchHash(int data)
{
	int p = Hash(data);
	HashNode ptr = hash[p].next;
	while(ptr != NULL && ptr->data!=data)
	{
		ptr = ptr->next;
	}
	if(ptr == NULL) 
		return false;
	return true;
}
 
int InsertHash(int data)
{
	if(SearchHash(data)==true)
	{
		return 0;
	}
	else
	{
		int p = Hash(data);
		HashNode hn = (HashNode)malloc(sizeof(struct node));
		hn->data = data;
		hn->next = NULL;
		if(hash[p].next == NULL)
		{
			hash[p].next = hn;
		}
		else
		{
			hn->next = hash[p].next;
			hash[p].next = hn;
		}
	}
	return 1;
}
 
void DeleteHash(int data)
{
	if(SearchHash(data)==true)
	{
		int p = Hash(data);
		HashNode ptr = hash[p].next;
		HashNode prePtr = ptr;
		if(ptr->data == data)
		{
			hash[p].next = ptr->next;
			free (ptr);
		}
		else
		{
			while(ptr != NULL && ptr->data != data)
			{
				prePtr = ptr;
				ptr = ptr->next;
			}
			prePtr->next = ptr->next;
			free(ptr);
		}
	}
	else
	{
		printf("Don't have the number\n");
	}
}
 
void HashTest()
{
	CreateHash();
	int data = -99;
	srand( (unsigned)time(NULL) );
	for(int i=0; i<30; i++)
	{
		data = rand();
		InsertHash(data);
	}
	PrintHash();
	printf("Enter a number to delete:");
	while(scanf("%d", &data) != EOF)
	{
		DeleteHash(data);
		PrintHash();
		printf("Enter a number to delete:");
	}
}
 
int main()
{
	HashTest();
	return 0;
}