#include <iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define OK 1
#define ERROR 0
int t;
typedef struct Book//图书的结构体
{
char ISBN[10];//书号
char name[20];//书名
int num; //库存
int sale; //销售量
int price; //价格
}Book;
typedef struct BLNode//Book单链表
{
Book data;
struct BLNode *next;
}BLNode,*LinkBLNode;
int InitList(LinkBLNode &L)//初始化
{
L=new BLNode;
L->next=NULL;
return OK;
}
void New_Book(LinkBLNode &L)//初始化__赋值
{
LinkBLNode p,r,s;
r=L;
p=new BLNode;
strcpy(p->data.ISBN,"001");
strcpy(p->data.name,"英语");
p->data.num=0;
p->data.price=10;
p->data.sale=5;
p->next=NULL;
r->next=p;
s=new BLNode;
strcpy(s->data.ISBN,"002");
strcpy(s->data.name,"高数");
s->data.num=5;
s->data.price=16;
s->data.sale=2;
r->next->next=s;
r->next->next->next=NULL;
}
BLNode *LocateElem(LinkBLNode L)//查找图书信息
{
LinkBLNode p;char e[20];
p=L->next;
cout<<"请输入的ISBN：";
cin>>e;
while(strcmp(p->data.ISBN,e)&&p!=NULL)
p=p->next;
return p;
}
void Num_Book(LinkBLNode L)//查找已售完图书信息
{
LinkBLNode p;
p=L->next;
cout<<"已售完图书信息为："<<endl;
while(p)
{
if(p->data.num==0)
{
cout<<"书号:"<<p->data.ISBN<<endl;
cout<<"书名:"<<p->data.name<<endl;
cout<<"价格:"<<p->data.price<<endl<<endl;
}
p=p->next;
}
}
void Buy_Book(LinkBLNode &L)//购买图书
{
LinkBLNode p;char e[20];
p=L->next;
cout<<"请输入的ISBN：";
cin>>e;
while(strcmp(p->data.ISBN,e)&&p!=NULL)
{p=p->next;break;}
if(!p) cout<<"购买失败，该图书不存在"<<endl;
else{
if(p->data.num==0) cout<<"购买失败，该图书库存为0"<<endl;
else {cout<<"购买成功"<<endl; p->data.num--;p->data.sale++;}
}
}
int menu()
{
int n;
cout<<"---欢迎登录网上图书销售系统---"<<endl<<endl;
cout<<"请选择你登录的身份："<<endl;
cout<<"1.顾客"<<"\t"<<"2.商家"<<"\t0.退出系统"<<endl;
cin>>n; return n;
}
int menu_client()
{
int n;
cout<<"---欢迎登录网上图书销售系统（顾客）---"<<endl<<endl;
cout<<"请选择你需要的功能："<<endl;
cout<<"1.查询图书库存信息"<<endl;
cout<<"2.查询已售完图书信息"<<endl;
cout<<"3.图书购买"<<endl;
cout<<"4.返回上一界面"<<endl;
cout<<"0.退出系统"<<endl;
cin>>n;return n;
}
int Switch_client(int n,LinkBLNode &L)
{
LinkBLNode S;
switch(n)
{
case 1: if(S=LocateElem(L))
cout<<"该图书的库存剩余为;"<<S->data.num<<endl;
else cout<<"该图书不存在"<<endl; break;
case 2: Num_Book(L);break;
case 3: Buy_Book(L);break;
case 4: t=0;break;
case 0: cout<<"正在退出...请稍后"<<endl;exit(0);break;
default: cout<<"输入错误...即将退出系统"<<endl;exit(0);
}
return OK;
}
void Sale_Book(LinkBLNode &L)//图书销售情况
{
LinkBLNode p;
p=L->next;
cout<<"销售情况为:"<<endl;
while(p!=NULL)
{
cout<<"书号："<<p->data.ISBN<<endl;
cout<<"书名："<<p->data.name<<endl;
cout<<"库存："<<p->data.num<<endl;
cout<<"价格："<<p->data.price<<endl;
cout<<"销量："<<p->data.sale<<endl<<endl;
p=p->next;
}
}
void PutIn_Book(LinkBLNode &L)//录入图书信息
{
LinkBLNode p,r;int i,j;
cout<<"请输入数据的个数：";
cin>>i;
r=L;
while(r->next){r=r->next;}
for(j=0;j<i;j++)
{
p=new BLNode;
printf("\n\n书号：");
scanf("%s",p->data.ISBN);
printf("书名：");
scanf("%s",&p->data.name);
printf("库存：");
scanf("%d",&p->data.num);
printf("价格：");
scanf("%d",&p->data.price);
printf("销量：");
scanf("%d",&p->data.sale);
p->next=NULL;
r->next=p;
r=p;
}
}
int Amend_Book(LinkBLNode &L)//修改图书信息
{
LinkBLNode p;
if(!(p=LocateElem(L))) return 0;
cout<<"请输入修改后的数据"<<endl;
cout<<"书号为：";
cin>>p->data.ISBN;
cout<<"书名为：";
cin>>p->data.name;
cout<<"库存为：";
cin>>p->data.num;
cout<<"价格为：";
cin>>p->data.price;
cout<<"销量为：";
cin>>p->data.sale;
return OK;
}
int Delete_Book(LinkBLNode &L)//删除图书信息
{
LinkBLNode p,q;int j,i;
p=L;j=0;
cout<<"请输入删除位置：\n";
cin>>i;
while((p->next)&&(j<i-1))
{p=p->next;++j;}
if(!(p->next)||(j>i-1)) return 0;
q=p->next;
p->next=q->next;
delete q;
cout<<"删除成功"<<endl;
return OK;
}
int menu_store()
{
int n;
cout<<"---欢迎登录网上图书销售系统（商家）---"<<endl<<endl;
cout<<"请选择你需要的功能："<<endl;
cout<<"1.查询图书库存信息"<<endl;
cout<<"2.查询已售完图书信息"<<endl;
cout<<"3.图书销售情况"<<endl;
cout<<"4.录入图书信息"<<endl;
cout<<"5.修改图书信息"<<endl;
cout<<"6.删除图书信息"<<endl;
cout<<"7.返回上一界面"<<endl;
cout<<"0.退出系统"<<endl;
cin>>n;return n;
}
int Switch_store(int n,LinkBLNode &L)
{
LinkBLNode S;
switch(n)
{
case 1: if(S=LocateElem(L))
cout<<"该图书的库存剩余为;"<<S->data.num<<endl;
else cout<<"不存在"<<endl; break;
case 2: Num_Book(L);break;
case 3: Sale_Book(L);break;
case 4: PutIn_Book(L);break;
case 5: Amend_Book(L);break;
case 6: Delete_Book(L);break;
case 7: t=0;break;
case 0: cout<<"正在退出...请稍后"<<endl;exit(0);break;
default: cout<<"输入错误...即将退出系统"<<endl;exit(0);
}
return OK;
}
main()
{
LinkBLNode L;
InitList(L);
New_Book(L);
while(1)
{
switch(t=menu())
{
case 1:while(t)
{Switch_client(menu_client(),L);}break;
case 2:while(t){Switch_store(menu_store(),L);}break;
case 0: cout<<"正在退出...请稍后"<<endl;exit(0);break;
default: cout<<"输入错误...即将退出系统"<<endl;exit(0);
}
}
return 0;
}
