[C language development] address book management system
Address book management system:
Functions:
1. Add, delete, modify and check
2. Write and read user data
3. Login account and password
4. Collect user comments and save
#include <stdio.h>
#include <malloc.h> //得到指向大小为Size的内存区域的首字节的指针//
#include <string.h>
#include <stdlib.h> //标准库函数//
#define NULL 0
#define LEN sizeof(struct address_list) //计算字节//
int n;
struct address_list
{
char name[30]; //名字
char work[30]; //职业
char handset[30]; //手机
char email[30]; //电子邮件
char address[30]; //通讯地址
struct address_list *next;
};
struct address_list *shifang(struct address_list *head); // 释放内存函数声明
//创建函数，不带头结点的链表
struct address_list *creat(void)
{
struct address_list *head,*p1,*p2;
char name[20];
n=0;
p1=(struct address_list *)malloc(LEN);
p2=p1; //强制内存转换
printf("请输入通讯录的内容!\n姓名输入为0时表示创建完毕!\n");
printf("请输入姓名:");
gets(name);
if(strcmp(name,"0")!=0)
{
strcpy(p1->name,name);
printf("请输入职业:"); gets(p1->work);
printf("请输入手机:"); gets(p1->handset);
printf("请输入电子邮件:"); gets(p1->email);
printf("请输入通讯地址:"); gets(p1->address);
head=NULL;
while(1)
{
n=n+1; //记录通讯录人数个数
if(n==1)
head=p1;
else
p2->next=p1;
p2=p1;
printf("请输入姓名:");
gets(name);
if(strcmp(name,"0")==0)
{
break;
}
else
{
p1=(struct address_list *)malloc(LEN);
strcpy(p1->name,name);
printf("请输入职业:"); gets(p1->work);
printf("请输入手机:"); gets(p1->handset);
printf("请输入电子邮件:"); gets(p1->email);
printf("请输入通讯地址:"); gets(p1->address);
}
}
p2->next=NULL;
return head;
}
else
return 0;
}
//输出函数
void print(struct address_list *head)
{
struct address_list *p;
if(head!=NULL)
{
p=head;
printf("本通讯录现在共有%d人:\n",n);
printf("---姓名-------职业--------手机-------Email-------通讯地址\n");
printf("==================================\n");
do
{
printf("== %s",p->name); printf(" ");
printf("%s",p->work); printf(" ");
printf("%s",p->handset); printf(" ");
printf("%s",p->email); printf(" ");
printf("%s",p->address); printf(" \n");
p=p->next;
}while(p!=NULL);
printf("==================================\n");
}
else
printf("通讯录为空,无法输出!\n");
}
//增加函数
struct address_list *insert(struct address_list *head)
{
struct address_list *p0,*p1,*p2;
char name[20];
p1=head;
printf("请输入增加的内容:\n");
printf("请输入姓名:"); gets(name);
if(strcmp(name,"0")==0)
{
printf("姓名不能为0,增加失败!\n");
return(head);
}
else
{
p0=(struct address_list *)malloc(LEN);
strcpy(p0->name,name);
printf("请输入职业:"); gets(p0->work);
printf("请输入手机:"); gets(p0->handset);
printf("请输入电子邮件:"); gets(p0->email);
printf("请输入通讯地址:"); gets(p0->address);
n=n+1;
if(head==NULL)
{
head=p0;
p0->next=NULL;
return head;
}
else
{
while(strcmp(p0->name,p1->name)>0&&(p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(strcmp(p0->name,p1->name)<0 || strcmp(p0->name,p1->name)==0)
{
if(head==p1)
{
head=p0;
}
else
{
p2->next=p0;
}
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
return head;
}
}
}
struct address_list* delete_txl(struct address_list *head)
{
struct address_list *p,*q;
char name[30];
if(head==NULL)
{
printf("通讯录为空,无法显示!\n");
return head;
}
p=head;
printf("请输入需要删除的人的姓名:");
gets(name);
if(strcmp(head->name,name)==0)
{
head=head->next;
free(p);
printf("删除操作成功！\n");
return head;
}
else
{
q=head,p=head->next;
while(p!=NULL)
{
if(strcmp(p->name,name)==0)
{
q->next=p->next;
free(p);
printf("删除操作成功！\n");
return head;
}
p=p->next;
q=q->next;
}
}
}
//显示函数
struct address_list *display(struct address_list *head)
{
struct address_list *p1,*p2;
char name[30];
int m;
if(head==NULL)
{
printf("通讯录为空,无法显示!\n");
return head;
}
p1=head;
m=0;
printf("请输入需要显示人的姓名:");
gets(name);
while(p1!=NULL)
{
while((strcmp(p1->name,name))!=0 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(strcmp(p1->name,name)==0)
{
m++;
printf("%s的通讯内容如下:\n",name);
printf("---姓名--------职业--------手机-------Email------通讯地址\n");
printf("==================================\n");
printf("== %s",p1->name);printf(" ");
printf("%s",p1->work);printf(" ");
printf("%s",p1->handset);printf(" ");
printf("%s",p1->email);printf(" ");
printf("%s",p1->address); printf(" \n");
printf("==================================\n");
}
p1=p1->next;
}
if(m==0)
{
printf("此人未在本通讯录中!\n");
}
return(head);
}
//排序函数
struct address_list *paixu(struct address_list *head)
{
struct address_list *p1,*p2;
int i,j;
struct address_list1
{
char name[30];
char work[30];
char handset[30];
char email[30];
char address[30];
};
struct address_list1 px[200];
struct address_list1 temp;
if(head==NULL)
{
printf("通讯录为空,无法排序!\n");
return(head);
}
p1=head;
for(i=0;i<n,p1!=NULL;i++)
{
strcpy(px[i].name,p1->name);
strcpy(px[i].work,p1->work);
strcpy(px[i].handset,p1->handset);
strcpy(px[i].email,p1->email);
strcpy(px[i].address,p1->address);
p2=p1;
p1=p1->next;
}
head=shifang(head);
for(j=0;j<n-1;j++)
{
for(i=j+1;i<n;i++)
{
if(strcmp(px[i].name,px[j].name)<0)
{
temp=px[i];
px[i]=px[j];
px[j]=temp;
}
}
}
p1=(struct address_list *)malloc(LEN);
p2=p1;
strcpy(p1->name,px[0].name);
strcpy(p1->work,px[0].work);
strcpy(p1->handset,px[0].handset);
strcpy(p1->email,px[0].email);
strcpy(p1->address,px[0].address);
head=p1;
for(i=1;i<n;i++)
{
p1=(struct address_list *)malloc(LEN);
strcpy(p1->name,px[i].name);
strcpy(p1->work,px[i].work);
strcpy(p1->handset,px[i].handset);
strcpy(p1->email,px[i].email);
strcpy(p1->address,px[i].address);
p2->next=p1;
p2=p1;
}
p2->next=NULL;
printf("按姓名排序后为:\n");
print(head);
return(head);
}
//姓名查找函数
struct address_list *search(struct address_list *head)
{
struct address_list *p1,*p2;
int m;
char name[30];
if(head==NULL)
{
printf("通讯录为空,无法分类查找!\n");
return(head);
}
p1=head;
printf("********************\n");
printf("** 请输入需要查找的姓名 **\n");
printf("********************\n");
m=0;
gets(name);
while(p1!=NULL)
{
while(strcmp(p1->name,name)!=0&&p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(strcmp(p1->name,name)==0)
{
m++;
printf("你查找的内容是:\n");
printf("+++++++++++++++++++++++++++++++++++\n");
printf("++ %s %s %s %s %s\n",p1->name,p1->work,p1->handset,p1->email,p1->address);
printf("+++++++++++++++++++++++++++++++++++\n");
}
p1=p1->next;
if(m==0)
{
printf("此人未在本通讯录中!\n");
}
break;
}
return(head);
}
//释放内存函数
struct address_list *shifang(struct address_list *head)
{
struct address_list *p1;
while(head!=NULL)
{
p1=head;
head=head->next;
free(p1);
}
return(head);
}
//文件写入函数
void save(struct address_list *head)
{
FILE *fp;
struct address_list *p1;
char tong[30];
if(head==NULL)
{
printf("通讯录为空,无法存储!\n");
return;
}
printf("请输入保存后的文件名:");
gets(tong);
fp=fopen("(tong).txt","w");
if(fp==NULL)
{
printf("cannot open file\n");
return;
}
p1=head;
fprintf(fp,"姓名 职业 手机 Email 通讯地址\n");
for(;p1!=NULL;)
{
fprintf(fp,"%s %s %s %s %s\n",p1->name,p1->work,p1->handset,p1->email,p1->address);
p1=p1->next;
}
printf("保存完毕!\n");
fclose(fp);
}
//文件读出函数
struct address_list *load(struct address_list *head)
{
FILE *fp;
char tong[30];
struct address_list *p1,*p2;
printf("请输入要输出的文件名:");
gets(tong);
fp=fopen("(tong).txt","r");
if(fp==NULL)
{
printf("此通讯录名不存在,无法输出!\n");
return(head);
}
else
{
head=shifang(head);
}
p1=(struct address_list *)malloc(LEN);
fscanf(fp,"%s%s%s%s%s",&p1->name,&p1->work,&p1->handset,&p1->email,&p1->address);
if(feof(fp)!=0)
{
printf("文件为空,无法打开!\n");
return(head);
}
else
{
rewind(fp);
p2=p1;
head=p1;
n=0;
while(feof(fp)==0)
{
fscanf(fp,"%s%s%s%s%s",&p1->name,&p1->work,&p1->handset,&p1->email,&p1->address);
if(feof(fp)!=0)
break;
p2->next=p1;
p2=p1;
p1=(struct address_list *)malloc(LEN);
n=n+1;
}
p2->next=NULL;
p1=head;
head=head->next;
n=n-1;
free(p1);
print(head);
printf("打开完毕!\n");
return(head);
}
fclose(fp);
}
//综合操作函数
struct address_list *menu(struct address_list *head)
{
char num[10];
while(1)
{
printf("*********************\n");
printf("*** 1 姓名查找 ****\n");
printf("*** 2 单个显示 ****\n");
printf("*** 3 增加 ****\n");
printf("*** 4 退出 ****\n");
printf("*********************\n");
printf("请输入您选择的操作:");
gets(num);
switch(*num)
{
case '1':
{
head=search(head); //姓名查找
print(head);
}
break;
case '2':
{
head=display(head); //显示
}
break;
case '3':
{
head=insert(head); //增加
print(head);
}
break;
case '4':
return head;
default:
printf("操作错误，此项不存在!\n");
break;
}
if(strcmp(num,"6")==0)
break;
}
return head;
}
//主函数
void main()
{
struct address_list *head=NULL;
char num[10];
printf("*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*\n");
printf("*=* 程序说明 *=*\n");
printf("*=* 请及时保存创建完毕的通讯录内容! *=*\n");
printf("*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*\n");
while(1)
{
printf("************************\n");
printf("*** 1 创建通讯录 ****\n");
printf("*** 2 按名字排序 ****\n");
printf("*** 3 综合操作 ****\n");
printf("*** 4 保存 ****\n");
printf("*** 5 打开 ****\n");
printf("*** 6 删除 ****\n");
printf("*** 7 退出 ****\n");
printf("************************\n");
printf("请输入您选择的操作:");
gets(num);
switch(*num)
{
case '1':
{
if(head==NULL)
{
head=creat(); //创建
print(head);
}
else
{
head=shifang(head);
head=creat(); //重新创建
print(head);
}
}
break;
case '2':
{
head=paixu(head); //排序
}
break;
case '3':
{
head=menu(head); //综合操作
}
break;
case '4':
{
save(head); //文件保存
print(head);
}
break;
case '5':
{
head=load(head); //文件输出
}
break;
case '6':
{
head=delete_txl(head); //删除
print(head);
}
break;
case '7':
head=shifang(head);
break;
default:
printf("操作错误，此项不存在!\n");
break;
}
if(strcmp(num,"7")==0)
break;
}
}