Merge pull request #139 from yang5220/master

先按照超时合并的评价来合并吧，如果还想继续修改，请re-open当前PR再提交变更。

Author: c4pr1c3

2017-1/ywy/Hash表/2017-06-18 (2).png

@@ -0,0 +1,167 @@
+#include"Hash.h"
+bool SuS(int n)
+{
+	int i;
+	if(n==2)
+	{
+		return TRUE;
+	}
+	for (i = 2; i < n; i++)
+	{
+		if(n%i==0)
+		{
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
+Status InitHashTable(HashTable*H,int size)
+{
+	int i;
+	ElemType temp;
+	H->count = 0;
+	H->maxsize = size;
+	H->elem = (ElemType*)malloc(sizeof(ElemType)*size);
+	if (!(H->elem))
+	{
+		return error;
+	}
+	for (i = 0; i < size; i++)
+	{
+		H->elem[i].key = UNKEY;
+		H->elem[i].val = UNVAL;
+	}
+	srand((unsigned)time(NULL));
+	for (i = 0; H->count<size/2; i++)//装载因子0.5
+	{
+		
+		temp.key = (int) rand() % size;
+		temp.val = (int) rand() % size;
+		InsertHashTable(H, temp);
+		//printf("%d---%d",temp.key,temp.val);
+	}
+	return ok;
+}
+bool Empty(HashTable H)
+{
+	if (H.count == 0)
+	{
+		return TRUE;
+	}
+	return FALSE;
+}
+bool Equal(KeyType a, KeyType b)
+{
+	if(a==b)
+	{
+		return TRUE;
+	}
+	return FALSE;
+}
+int SearchHashTable(HashTable H, KeyType key, int*add, int*count)
+{
+	*add = key% H.maxsize;
+	*count = 0;//冲突次数
+	while (H.elem[*add].key != UNKEY && !Equal(key, H.elem[*add].key))//发生冲突
+	{
+		if ((*add) < H.maxsize)
+		{
+			//与Hash表中发生冲突的元素
+			printf("冲突： 关键字--值%d->%d\n", H.elem[*add].key, H.elem[*add].val);
+			(*add)++;
+			(*count)++;
+		}
+		else
+			break;
+	}
+	
+	if (Equal(key, H.elem[*add].key))
+	{
+		return SUCCESS;
+	}
+	else
+	{
+		return UNSUCCESS;
+	}
+}
+Status InsertHashTable(HashTable*H, ElemType e)
+{
+	int add, count;
+	if (SearchHashTable(*H, e.key, &add, &count) == SUCCESS)
+	{ 
+		return DUPLICATE;
+	}
+	else {
+		if (add == H->maxsize || count > H->maxsize / 2)
+		{
+			ReHash(H);
+		}
+		H->elem[add] = e;
+	    H->count++;
+		printf("插入[%d]:%d->%d", add, H->elem[add].key, H->elem[add].val);
+		printf("碰撞次数:%d\n", count);
+		return ok;
+	}
+	
+}
+Status ReHash(HashTable *H)
+{
+	int i, n;
+	HashTable temp; 
+	if (Empty(*H)) 
+	{
+		return error;
+	}
+	n = 2 * H->maxsize;
+	while (!SuS(n)) 
+	{
+		n++;
+	}
+	temp.maxsize = n;
+	temp.count = H->count;
+	temp.elem = (ElemType *)malloc(sizeof(ElemType)*n);
+	for (i = 0; i < n; i++)
+	{
+		temp.elem[i].key = UNKEY;
+		temp.elem[i].val = UNVAL;
+	}
+
+	for (i = 0; i < H->maxsize; i++) {
+		temp.elem[i].key = H->elem[i].key;
+		temp.elem[i].val = H->elem[i].val;
+	}
+
+	H->maxsize = temp.maxsize;
+
+	H->count = temp.count;
+
+	H->elem = (ElemType *)malloc(sizeof(ElemType)*n);
+
+	for (i = 0; i < n; i++) 
+	{
+		H->elem[i].key = temp.elem[i].key;
+		H->elem[i].val = temp.elem[i].val;
+	}
+
+	free(temp.elem);
+	return ok;
+}
+Status PrintHash(HashTable H)
+{
+	int i;
+	if(Empty(H))
+	{
+		return error;
+	}
+	printf("print hash\n");
+	for (i = 0; i < H.maxsize; i++)
+	{
+		printf("[%d]: %d->%d\n", i, H.elem[i].key, H.elem[i].val);
+	}
+	return ok;
+}
+
+
+
+
+

2017-1/ywy/Hash表/Hash.c

@@ -0,0 +1,46 @@
+#pragma once
+#include<stdio.h>
+#include<time.h>
+#include<stdlib.h>
+#include<math.h>
+#define SUCCESS 1
+#define UNSUCCESS 0
+#define DUPLICATE -1
+#define UNKEY -1
+#define UNVAL 0
+//#define HASHSIZE 30
+typedef int KeyType;
+typedef int ValueType;
+typedef struct _ElemType
+{
+	KeyType key;//关键字
+	ValueType val;//值
+#ifdef CHAINED_HASH
+	struct _ElemType*next;
+#endif
+}ElemType;
+typedef struct
+{
+	 ElemType*elem;//存储哈希表元素
+	int count;
+	int maxsize;
+}HashTable;
+typedef enum
+{
+	ok,
+	error
+}Status;
+
+typedef enum
+{ 
+	FALSE,
+	TRUE
+}bool;
+Status PrintHash(HashTable H);
+Status InitHashTable(HashTable*H,int size);
+Status InsertHashTable(HashTable*H, ElemType e);
+bool Empty(HashTable H);
+bool Equal(KeyType a, KeyType b);
+bool SuS(int n);
+int SearchHashTable(HashTable H, KeyType key, int*add, int*count);
+Status ReHash(HashTable *H);

2017-1/ywy/Hash表/Hash.h

@@ -0,0 +1,30 @@
+#include"Hash.h"
+int main()
+
+{
+	int size;
+	int i;
+	KeyType key;
+	HashTable H;
+	size = 11;//
+	srand((unsigned)time(NULL));
+	
+	InitHashTable(&H, size);
+	PrintHash(H);
+	int add = 0;
+	int count = 0;
+	for (i = 0; i < H.count; i++)
+	{
+		key = rand() % size;
+		if(SearchHashTable(H,key,&add,&count)==SUCCESS)
+		{
+			printf("find %d  ", key);
+			printf("address %d: \n", add);
+		}
+		else
+		{
+			printf("not find %d:  \n", key);
+		}
+	}
+	return 0;
+}