版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/u011469138/article/details/81194605
自己写的一个基础的管理系统，使用链表实现，能实现登入、建立链表、插入信息、查询信息、信息排序、信息删减、保存链表至本地和从本地数据中创建链表等功能
首先是链表的建立和节点插入，我是首先建立链表（第一次使用软件），之后的信息添加则通过添加节点实现
struct save *creat()//建立链表函数
{
struct save *p1,*p2,*head;
int n=0;
head=NULL;
p1=p2=(struct save *)malloc(sizeof(save));
printf("************************************\n");
printf("请输入入住信息:\n\n");
printf("------------------------------------\n");
printf("请输入房号:\n\n");
scanf("%d",&p1->num);
printf("------------------------------------\n");
printf("请输入性别:\n\n");
scanf("%s",&p1->sex);
printf("------------------------------------\n");
printf("请输入姓名:\n\n");
scanf("%s",&p1->name);
printf("------------------------------------\n");
printf("请输入身份证号码:\n\n");
scanf("%s",&p1->id);
printf("------------------------------------\n");
printf("请输入联系电话:\n\n");
scanf("%s",&p1->phone);
printf("------------------------------------\n");
printf("请输入入住时长:\n\n");
scanf("%d",&p1->day);
printf("------------------------------------\n");
printf("************************************\n");
head=p1;
head->next=NULL;
return head;
}void add(struct save *head)//添加节点函数
{
struct save *p;
struct save *p2;
p2=(struct save*)malloc(sizeof(save));
p=head;
while(p->next!=NULL)
{
p=p->next;
}
p->next=p2;
printf("************************************\n");
printf("请输入入住信息:\n\n");
printf("------------------------------------\n");
printf("请输入房号:\n\n");
scanf("%d",&p2->num);
printf("------------------------------------\n");
printf("请输入性别:\n\n");
scanf("%s",&p2->sex);
printf("------------------------------------\n");
printf("请输入姓名:\n\n");
scanf("%s",&p2->name);
printf("------------------------------------\n");
printf("请输入身份证号码:\n\n");
scanf("%s",&p2->id);
printf("------------------------------------\n");
printf("请输入联系电话:\n\n");
scanf("%s",&p2->phone);
printf("------------------------------------\n");
printf("请输入入住时长:\n\n");
scanf("%d",&p2->day);
printf("------------------------------------\n");
p2->next=NULL;
}接下来是查询模块，有按房号查询和名字查询两种，都是遍历链表比对关键字实现
void idsearch(struct save *head,int n)//房号查询函数
{
struct save *p;
p=head;
int ok=0;
if(head!=NULL)
{
while(p!=NULL)
{
if(p->num==n)
{ printf("*************************************\n");
printf("%d房的住户姓名为%s\n",n,p->name);
printf("*************************************\n\n");
ok=1;
return;
}
else
p=p->next;
}
}
if(ok==0)
printf("该房号没有住户\n\n");
}
void namesearch(struct save *head,char nam[20])//
{
struct save *p;
p=head;
int ok=0;
if(head!=NULL)
{
while(p!=NULL)
{
if(strcmp(p->name,nam)==0)
{ printf("*************************************\n");
printf("住户%s在%d号房\n",p->name,p->num);
printf("*************************************\n\n");
ok=1;
return;
}
else
p=p->next;
}
}
if(ok==0)
printf("该住户不存在\n\n");
}删除（退房模块）
struct save *exit(struct save *head,int num)
{
struct save *p,*p2,*p3;
// p=p2=p3=(struct save*)malloc(sizeof(save));
p3=NULL;
p=head;
int ok=0;
if(head!=NULL)
{
while(p!=NULL)
{ if(p->num!=num) {p3=p; p=p->next;}
if(p->num==num)
{
char x;
printf("------------------------------------\n");
printf("%d房的住户姓名为%s\n",num,p->name);
printf("------------------------------------\n");
printf("该住户的房费为%d元\n",p->day*price);
printf("------------------------------------\n");
printf("是否确定退房？<y/n>\n");
printf("------------------------------------\n");
getchar();
scanf("%c",&x);
if(x=='y')
{
if(p==head)
head=head->next;
else
p3->next=p->next;
printf("退房成功！\n\n");
}
ok=1;
return head;
}
}
}
if(ok==0)
printf("该房号没有住户\n\n");
}接下来还有比较难的文件操作部分
1.保存至本地
void print(struct save *head)//打印和保存函数
{
sort(head);
struct save *p;
p=head;
FILE *w =fopen("output.txt","w");
if(w==NULL)
{
printf("打开文件失败!");
return;
}
if(head!=NULL)
{
while(p!=NULL)
{
printf("*************************************\n");
printf("房号：\n");
printf("%d\n",p->num);
fprintf(w,"%d ",p->num);
printf("------------------------------------\n");
printf("住户性别\n");
printf("%s\n",p->sex);
fprintf(w,"%s ",p->sex);
printf("------------------------------------\n");
printf("住户姓名：\n");
printf("%s\n",p->name);
fprintf(w,"%s ",p->name);
printf("------------------------------------\n");
printf("住户身份证号码：\n");
printf("%s\n",p->id);
fprintf(w,"%s ",p->id);
printf("------------------------------------\n");
printf("住户电话号码：\n");
printf("%s\n",p->phone);
fprintf(w,"%s ",p->phone);
printf("------------------------------------\n");
printf("住户入住时长：\n");
printf("%d\n",p->day);
fprintf(w,"%d\n",p->day);
printf("------------------------------------\n\n");
p=p->next;
}
// fprintf(w,"\n");
fclose(w);
}
else
printf("当前旅馆没有住户\n\n");
}2.从本地数据建表
struct save *filecreat()//文件读取函数
{
struct save *head;
head = NULL;
int num1;
char ch;
char sex1[100];
char name1[100];
char id1[100];
char phone1[100];
int day1;
struct save *p = NULL;
struct save *q;
FILE * r= fopen("output.txt","r");
if(r==NULL)
{
printf("文件打开失败!");
return NULL;
}
head = p;
while(fscanf(r,"%d",&num1) != EOF)
{
fscanf(r,"%s",sex1);
fscanf(r,"%s",name1);
fscanf(r,"%s",id1);
fscanf(r,"%s",phone1);
fscanf(r,"%d",&day1);
q=(struct save*)malloc(sizeof(save));
q->num=num1;
strcpy(q->sex,sex1);
strcpy(q->name,name1);
strcpy(q->id,id1);
strcpy(q->phone,phone1);
q->day=day1;
q->next=NULL;
if(p == NULL)
{
p = q;
head = p;
continue;
}
else{
p->next = q;
}
//cout<<"debug"<<endl;
p = q;
}
fclose(r);
return head;
}
全部源代码我已经上传github，需要的同学可以参考
https://github.com/ZeroT900sk/hotel
注意其中的cpp源代码和两个txt文件都要下载，output.txt是储存本地信息，user.txt是保存密码