姓名、性別、年齡、電話、住址

程式如下：

#include<stdio.h>
#include<string.h>
#include<stdlib.h>

#define LEN sizeof(struct student)											

struct student
{
	int i;
	char name[20];
	char tel[15];
	char addr[50];
	struct student*next;
};

void menu()					//目錄格式
{
	printf("=================歡迎來到蘇嵌154班通訊錄======================\n");
	printf("-------------------1.新增我班寶寶聯絡資訊---------------------\n");
	printf("-------------------2.刪除我班寶寶聯絡資訊---------------------\n");
	printf("-------------------3.修改我班寶寶聯絡資訊---------------------\n");
	printf("-------------------4.查詢我班寶寶聯絡資訊---------------------\n");
	printf("-------------------5.展示我班全體寶寶資訊---------------------\n");
	printf("-------------------6.刪除全體寶寶聯絡資訊---------------------\n");
	printf("-------------------7.感謝你的偷看，白白-----------------------\n");
	printf("=================歡迎來到蘇嵌154班通訊錄======================\n");
}

struct student *creat()										//建立連結串列
{
	struct student*p1,*p2,*head;
	int n = 0;
	head = NULL;
	p1=p2=(struct student*)malloc(LEN);
	printf("輸入新成員學號：\n");
	scanf("%d",&p1->i);
	printf("輸入新成員姓名：\n");
	scanf("%s",p1->name);
	printf("輸入新成員號碼：\n");
	scanf("%s",p1->tel);
	printf("輸入新成員地址：\n");
	scanf("%s",p1->addr);
	printf("新增新成員成功！\n");
	while(p1->i != 0)
	{
		n = n+1;
		if(n == 1)
			head = p1;
		else
			p2->next = p1;
		p2 = p1;
		p1 = (struct student*)malloc(LEN);
		printf("輸入新成員學號：\n");
		scanf("%d",&p1->i);
		printf("輸入新成員姓名：\n");
		scanf("%s",p1->name);
		printf("輸入新成員號碼：\n");
		scanf("%s",p1->tel);
		printf("輸入新成員地址：\n");
		scanf("%s",p1->addr);
		printf("新增新成員成功！\n");	
	}
	p2->next = NULL;
	return head;
}

struct student *add(struct student *head,int index)					//增加聯絡人
{
	printf("新增聯絡人：\n");
	struct student *p1,*p2,*p3;
	p3=(struct student*)malloc(LEN);
	printf("輸入新成員學號：\n");
	scanf("%d",&p3->i);
	printf("輸入新成員姓名：\n");
	scanf("%s",p3->name);
	printf("輸入新成員號碼：\n");
	scanf("%s",p3->tel);
	printf("輸入新成員地址：\n");
	scanf("%s",p3->addr);
	printf("新增新成員成功！\n");
	p1 = p2 = head;
	while(p1->next != NULL && p1->i != index) 
	{
		p2 = p1;
		p1 = p1->next;
	}
	if(p1->i == index)
	{
		if(p1 == head)
		{
			head = p3;
			p3->next = p1;
		}
		else
		{
			p2->next = p3;
			p3->next = p1;
		}
	}
	else
	{
		p1->next = p3;
		p3->next = NULL;
	}
	return head;
}

struct student *delete(struct student *head,char name[20])										//刪除聯絡人
{	
	struct student *p1,*p2;
	p1 = head;
	p2 = p1;
	while(p1->next !=NULL && strcmp(p1->name,name) != 0)
	{
		p2=p1;
		p1=p1->next;		
	}
	if(strcmp(p1->name,name) == 0)
	{
		if(p1 == head)
		{
			head = head->next;
			printf("刪除聯絡人成功\n");
		}
		else
		{
			p2->next = p1->next;
			printf("刪除聯絡人成功\n");
		}
	}
	else
	{
		printf("目前通訊錄沒這個寶寶！\n");
	}
	free(p1);
	return head;
}

struct student *modify(struct student *head,char name[20])					//修改聯絡人
{
	struct student *p;
	p = head;
	while(p->next != NULL && strcmp(p->name,name)!=0)
	{
		p = p->next;
	}
	if(strcmp(p->name,name)==0)
	{
		printf("輸入修改成員學號：\n");
		scanf("%d",&p->i);
		printf("輸入修改的姓名：\n");
		scanf("%s",p->name);
		printf("輸入修改的號碼：\n");
		scanf("%s",p->tel);
		printf("輸入修改的地址：\n");
		scanf("%s",p->addr);
		printf("修改成功\n");
	}
	else
	{
		printf("目前通訊錄沒這個寶寶！\n");
	}
	return head;
}

struct student *find(struct student *head,char name[20])					//查詢聯絡人
{
	struct student *p1;
	p1 = head;
	while(p1->next != NULL && strcmp(p1->name,name)!=0)
	{
		p1 = p1->next;	
	}
	if(strcmp(p1->name,name)==0)
	{
		printf("序號\t姓名\t號碼\t地址\t\n");
		printf("%d\t",p1->i);
		printf("%s\t",p1->name);
		printf("%s\t",p1->tel);
		printf("%s\t",p1->addr);
		printf("\n");
	}
	else
		printf("目前通訊錄沒這個寶寶！\n");	
}

															
void show(struct student *head)						//列印連結串列
{
	struct student *p;
	p = head;
	if(head != NULL)
	{
		do
			{
				printf("序號\t姓名\t號碼\t地址\t\n");
				printf("%d\t",p->i);
				printf("%s\t",p->name);
				printf("%s\t",p->tel);
				printf("%s\t",p->addr);
				printf("\n");
				p = p->next;
			}while(p != NULL);
	}	
	else
	printf("目前通訊錄沒寶寶！\n");
}

struct student *clear(struct student *head)
{
	head = NULL;
	return head;
	
}

int main()
{
	int n = 1;
	int i;
	struct student *head;
	head = creat();
	char name[20];
	int index;						
	while(n)
	{
		menu();
		printf("請輸入你的騷操作：\n");
		scanf("%d",&i);
		switch(i)
		{
			case 1:
			{
				printf("請輸入插到哪個學號前：\n");
				scanf("%d",&index);
				head = add(head,index);break;
		    }
			case 2:
			{ 
				printf("請輸入要刪除聯絡人的姓名:\n");
				scanf("%s",name);
				head = delete(head,name);break; 
			}
			case 3:
			{
				printf("請輸入需要修改的聯絡人的姓名：\n");
				scanf("%s",name);
				modify(head,name);break;
			}
			case 4:
			{
				printf("請輸入查詢聯絡人的姓名：\n");
				scanf("%s",name);
				find(head,name);break;
			}
			case 5:
			{
				show(head);break;
			}
			case 6:
			{
				head = clear(head);break;
			}
			default:
			{
				break;
			}
		}
	}
}