基于C语言的简单图书管理系统.zip

#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; }