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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct bookinfo
{
char name[20]; //书名
char author[10]; //作者
char date[20]; //出版日期
float price; //价格
int num; //数量
};
struct Node
{
struct bookinfo data;
struct Node* next;
};
/*全局链表*/
struct Node* list = NULL;
/*创建表头*/
struct Node* createhead()
{
/*动态内存申请*/
struct Node* headNode = (struct Node*)malloc(sizeof(struct Node));
headNode->next = NULL;
return headNode;
}
/*创建节点*/
struct Node* createNode(struct bookinfo data)
{
struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
newNode->data = data;
newNode->next = NULL;
return newNode;
}
void printList();
void display_menu();
void savebookfile();
void insertbook();
void readbookfile();
void deletebook();
struct Node* searchbook();
void sortbook();
void selectkey();
/*打印链表*/
void printList(struct Node* headNode)
{
struct Node* Bmove = headNode->next;
printf("书名\t作者\t出版日期\t价格\t库存\n");
while(Bmove != NULL)
{
printf("%s\t%s\t%s\t%.1f\t%d\n",Bmove->data.name,Bmove->data.author,Bmove->data.date,Bmove->data.price,Bmove->data.num);
Bmove = Bmove->next;
}
}
/*菜单登录界面*/
void display_menu()
{
char str[100];
FILE *fp;
char *txt;
fp = fopen("menu.txt","r");
txt = fgets(str,100,fp);
while(txt != NULL)
{
printf("%s",str);
txt = fgets(str,100,fp);
}
fclose(fp);
}
/*将信息存到文件中*/
void savebookfile(const char* filename,struct Node* headNode)
{
FILE* fp = fopen(filename,"w");
struct Node* Bmove = headNode->next;
while(Bmove != NULL)
{
fprintf(fp,"%s\t%s\t%s\t%.1f\t%d\n",Bmove->data.name,Bmove->data.author,Bmove->data.date,Bmove->data.price,Bmove->data.num);
Bmove = Bmove->next;
}
fclose(fp);
}
/*录入书籍*/
void insertbook(struct Node* headNode,struct bookinfo data)
{
struct Node* newNode = createNode(data);
newNode->next = headNode->next;
headNode->next = newNode;
}
/*读取文件*/
void readbookfile(const char* filename, struct Node* headNode)
{
FILE* fp = fopen(filename,"r");
if(fp == NULL)
{
fp = fopen(filename,"w+");
}
struct bookinfo tempinfo;
while(fscanf(fp, "%s\t%s\t%s\t%.1f\t%d\n",tempinfo.name,&tempinfo.author,&tempinfo.date,&tempinfo.price,&tempinfo.num ) != EOF)
{
insertbook(list,tempinfo);
}
fclose(fp);
}
/*删除书籍*/
void deletebook(struct Node* headNode,char *bookname)
{
struct Node* leftNode = headNode;
struct Node* rightNode = headNode->next;
while(rightNode != NULL && strcmp(rightNode->data.name,bookname))
{
leftNode = rightNode;
rightNode = leftNode->next;
}
if(leftNode == NULL)
{
return;
}
else
{
printf("删除书籍成功！\n");
leftNode->next = rightNode->next;
free(rightNode);
rightNode = NULL;
}
}
/*查找书籍*/
struct Node* searchbook(struct Node* headNode, char* bookname)
{
struct Node* rightNode = headNode->next;
while (rightNode != NULL && strcmp(rightNode->data.name, bookname))
{
rightNode = rightNode->next;
}
return rightNode;
}
/*排序书籍*/
void sortbook(struct Node* headNode)
{
for(struct Node* i = headNode->next; i != NULL; i = i->next)
{
for(struct Node* j = headNode->next;j->next != NULL;j = j->next)
{
/*排序书籍(按价格降序)*/
if (j->data.price < j->next->data.price)
{
/*交换值*/
struct bookinfo tempdata = j->data;
j->data = j->next->data;
j->next->data = tempdata;
}
}
}
/*排序后查看效果*/
printList(headNode);
}
/*交互界面*/
void selectkey()
{
int userkey = 0;
struct bookinfo tempbook; //生成一个临时的变量存储书籍信息
struct Node* searchname = NULL; //生成一个临时变量存储查找的书名
struct Node* borrowbook = NULL; //生成一个临时变量存储要借阅的书名
struct Node* returnbook = NULL; //生成一个临时变量存储要归还的书名
scanf("%d",&userkey);
switch(userkey)
{
case 1:
printf("[ 录入书籍 ]\n");
printf("输入书籍的信息(name,author,date,price,num):");
scanf("%s%s%s%f%d",tempbook.name,&tempbook.author,&tempbook.date,&tempbook.price,&tempbook.num);
insertbook(list,tempbook);
/*把书籍信息保存到booksinfo文本文件里*/
savebookfile("bookinfo.txt",list);
break;
case 2:
printf("[ 浏览书籍 ]\n");
printList(list);
break;
case 3:
printf("[ 借阅书籍 ]\n"); /*书籍存在可以借阅，库存-1，书的库存不足则无法借阅*/
printf("请输入要借阅的书名：");
scanf("%s",tempbook.name);
borrowbook = searchbook(list,tempbook.name);
if(borrowbook == NULL)
{
printf("不存在该书，无法借阅！\n");
}
else
{
if(borrowbook->data.num > 0)
{
borrowbook->data.num--;
printf("借阅成功！\n");
printList(list);
}
else
{
printf("当前书籍库存不足,借阅失败！\n");
}
}
break;
case 4:
printf("[ 归还书籍 ]\n"); //库存+1
printf("请输入要归还的书名：");
scanf("%s",tempbook.name);
returnbook = searchbook(list,tempbook.name);
if(returnbook == NULL)
{
printf("该书不是图书馆里的书籍！\n");
}
else
{
returnbook->data.num++;
printf("书籍归还成功！\n");
printList(list);
}
break;
case 5:
printf("[ 删除书籍 ]\n");
printf("请输入要删除的书名：");
scanf("%s",tempbook.name);
deletebook(list,tempbook.name); /*按书名删除书籍*/
printList(list);
break;
case 6:
printf("[ 查找书籍 ]\n");
printf("请输入要查询的书名：");
scanf("%s",tempbook.name);
searchname = searchbook(list,tempbook.name);
if(searchname == NULL)
{
printf("不存在该书，请加购录入！\n");
}
else
{
/*输出该书的信息*/
printf("书名\t作者\t出版日期\t价格\t库存\n");
printf("%s\t%s\t%s\t%.1f\t%d\n",searchname->data.name,searchname->data.author,searchname->data.date,searchname->data.price,searchname->data.num);
}
break;
case 7:
printf("[ 排序书籍 ]\n"); /*按价格排序(降序)*/
sortbook(list);
break;
case 8:
printf("[ 退出系统 ]\n");
printf("退出成功\n");
system("pause");
exit(0); /*关闭整个程序*/
break;
default:
printf("[ 错误 ]\n");
break;
}
}
/*主界面*/
int main()
{
list = createhead();
readbookfile("bookinfo.txt",list);
while(1)
{
display_menu();
selectkey();
system("pause");
system("cls");
}
system("pause");
return 0;
}
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