哈希表实现电话号码查找系统

设计任务

设计哈希表实现电话号码查找系统

1. 设每个记录有下列数据项：电话号码、用户名、地址
2. 从键盘输入个记录，分别以电话号码和用户名为关键字建立不同的哈希表
3. 采用线性探测再散列的方法解决冲突
4. 查找并显示给定电话号码的记录
5. 查找并显示给定用户名的记录

主要算法功能

main.c文件

#include"hash.h"

int main()
{
     
	char s[20];
	int n,Fn;
	int num;//contact number
	Bridge head;//include namehash table and phonehash table
	while(1)
	{
     
		Menu();
		printf("Enter：");
		scanf("%d",&n);
		switch(n)
		{
     
			case 1:
				printf("Enter number of contacts:");
				scanf("%d",&num);
				Fn=Fprime(num);//get next prime
				head=Create(num);//creat link
				Clean();
				break;
			case 2:
				Query(head,Fn);
				Clean();
				break;
			case 3:
				ShowAll(head,Fn);//print all contacts
				Clean();
				break;
			case 4:
				printf("\nThank you for using my software!\n");
				return 0;
		}
	}
}

hash.h文件

#include
#include
#include
#include
#define MAXNUMBER 100000
typedef struct node
{
     
	char name[8];
	char phone[12];
	char adress[50];
	int state;
	struct node *next;
}contnode;
typedef struct 
{
     
	contnode *Hn;//head node of name
	contnode *Hp;//head node of phone
}Bridge;
void Menu()
{
     
	printf("\n----------Menu----------\n\n");
	printf(" 1.Create contacts\n");
	printf(" 2.Query contacts\n");
	printf(" 3.Show all contacts\n");
	printf(" 4.Exit\n");
	printf("------------------------\n");
 } 
void Clean()//clear window
{
     
	printf("\nClear window? (Y/N)\t");
	getchar();//filter \n
	if(getchar()=='Y')
		system("cls");
}
void ShowAll(Bridge h,int n)//show all contacts
{
     
	contnode *p=h.Hp;
	printf("\nName\tPhone\t\tAdress");
	printf("\n--------------------------------------\n");
	while(n--)
	{
     
		if(p->state==1)
			printf("%s\t%s\t%s\n",p->name,p->phone,p->adress);				
		p=p->next;
	}	
	
	
}
int Fprime(int n)//find next prime
{
     
	int i,p=(n%2)?n+2:n+1;
	while(p<=MAXNUMBER)
	{
     
		for(i=(int)sqrt(p);i>2;i--)
			if(!(p%i))
				break;
		if(i==2)
			break;
		else 
			p+=2;
	 } 
	return p;
}
contnode* CreatTable(int num)//insert tail & init
{
     
	contnode *p,*q,*h;
	q=p=h=(contnode*)malloc(sizeof(contnode));
	h->state=0;
	while(num--)
	{
     
		p=(contnode*)malloc(sizeof(contnode));
		strcpy(p->name,"\0");
		strcpy(p->adress,"\0");
		strcpy(p->phone,"\0");
		p->state=0;
		q->next=p;
		q=p;
	}
	p->next=NULL;
	return h;
}
int Ghashn(char *key,int num)//get hash name number
{
     
	unsigned int h=0;
	while(*key!='\0')
		h=(h<<5)+*key++;
	return h%num;
}
int Ghashp(char *key,int num)//get hash phone number
{
     
	int i;
	int sum=0;
	for(i=6;i<=10;i++)
		sum=sum*10+key[i]-'0';
	return sum%num;
}

void HashTable(char *name,char *phone,char *adress,contnode *h,int flag,int size)//create table
{
     
	int seat;
	contnode *p=h;
	if(flag)
		seat=Ghashp(phone,size);
	else
		seat=Ghashn(name,size);
	while(seat&&seat--)//Go to the designated location
		p=p->next;
	while(p->state!=0)//Linear Probing(if state==1 ,find the next one)
	{
     
		if(p->next==NULL)
		{
     
			p=h;
			continue; 
		} 
		p=p->next;
	 } 
		
	strcpy(p->name,name);
	strcpy(p->adress,adress);
	strcpy(p->phone,phone);	
	p->state=1;
}
void show(contnode *n)//print the contact
{
     
	printf("\nName\tPhone\t\tAdress");
	printf("\n--------------------------------------\n");
	printf("%s\t%s\t%s\n",n->name,n->phone,n->adress);
}

void FindSeat(contnode *h,int size,int flag)//find seat of number
{
     
	char key[15];
	int seat,bseat,f=1;
	contnode *p=h;
	printf("\nEnter key:");
	scanf("%s",key);
	if(flag)
		seat=Ghashp(key,size);//find table number of phone
	else 
		seat=Ghashn(key,size);//find table number of name
	bseat=seat;
	while(seat>0&&--seat)
		p=p->next;
	if(flag)
		while(strcmp(p->phone,key)!=0)
		{
     
			if(p->next==NULL)//If to the end锛宐ack to the head
			{
     
				f=1;
				p=h;
			}
			if(f)
				bseat++;
			if(bseat>=size)//If steps are larger than size锛宺eturn
			{
     
				printf("\nSorry,not found!\n");
				return;
			}
			p=p->next;
		}
	else
		while(strcmp(p->name,key)!=0)
		{
     
			if(p->next==NULL)
			{
     
				f=1;
				p=h;
			}
			if(f)
				bseat++;
			if(bseat>=size)
			{
     
				printf("\nSorry,not found!\n");
				return;
			}
			p=p->next;
		}
		
	show(p);//print node
}
Bridge Create(int num)
{
     
	int i;
	contnode *Hp,*Hn;
	Bridge h;
	char name[8],adress[20],phone[12];
	Hp=CreatTable(Fprime(num));//get head node
	Hn=CreatTable(Fprime(num));
	for(i=0;i<num;i++)
	{
     
		printf("\n%dst contact:",i+1);
		printf("\nEnter name:");
		scanf("%s",name);
		printf("Enter phone:");
		scanf("%s",phone);
		printf("Enter adress:");
		scanf("%s",adress);
		HashTable(name,phone,adress,Hn,0,Fprime(num));//create hashtable by name
		HashTable(name,phone,adress,Hp,1,Fprime(num));//create hashtable by phone
	}
	h.Hn=Hn;
	h.Hp=Hp;
	return h;
}
void Query(Bridge head,int size)
{
     
	int n;
	printf("\n-------Choose way-------\n");
	printf("1.By Name\n");
	printf("2.By Phone\n");	
	printf("------------------------\n");
	printf("Enter:");	
	scanf("%d",&n);
	switch(n)
	{
     
		case 1:FindSeat(head.Hn,size,0);
			break;
		case 2:FindSeat(head.Hp,size,1);
			break;
	}
}