数据结构课程设计---商品销售管理系统C/C++

一、需求分析

1、商品上架：添加商品信息；
2、商品浏览：输出商品信息；
3、商品销售：输入商品编号和购买数量，通过商品标号获得商品名称和单价；通过输入的购买数量，修改该商品的库存量，计算该商品应付金额。一个销售单可包含多个商品，操作结束时打印整个销售单应付的金额；
4、商品查询；

二、数据结构

1)逻辑结构
商品及销售单使用线性结构表示（顺序表）
2)物理结构（物理结构要给出所用到的类型定义，如结点类型、线性表类型等）
//商品结构体
struct Goods {
string id; //编号
string name; //名称
double price; //单价
string producer; //生产商
int store; //库存
};
//销售单项
struct OrderItem {
string id; //编号
string name; //名称
double price; //单价
int count; //数量
};

typedef struct {
Goods *elem;//顺序表首地址
int length;
} SqlList; //商品表

typedef struct {
OrderItem *elem;
int length;
} OrderSqlList; //订单表

三、函数调用关系（所有函数间的调用关系，包括main函数）

main函数根据用户输入数字选项调用以下函数

//初始化
status InitListSq(SqlList &L);
status InitOListSq(OrderSqlList &L);

//根据id,name查询商品
int locateElem_Sq(SqlList &L, string id);

int Find_Name(SqlList &L, string name) ;

//商品上架
status ListInsert(SqlList &L, Goods g);

//添加订单
status ListOInsert(OrderSqlList &L, OrderItem o);

//商品的销售修改goods库存
int ListUpdate(SqlList &L, string id, int count);

//打印
void PrintAllGoods(SqlList &L);
void PrintOrder(OrderSqlList &L);

//保存
void Save_Disk(SqlList &L);
void Save_Order_Disk(OrderSqlList &L);

【代码】
shop.h

#include<iostream>
#include<fstream>
#include<string>
#include<cstring>
#include<stdio.h>// 程序状态码
#define MAXSIZE 100
#define OK 1
#define ERROR0 -3
#define ERROR1 0
#define ERROR2 -1
#define OVERFLOW -2using namespace std;typedef int status;//返回值状态
typedef int ElemType;//返回值的类型//商品结构体
struct Goods {string id; //编号string name; //名称double price; //单价string producer; //生产商int store;  //库存};
//销售项
struct OrderItem {string id; //编号string name; //名称double price; //单价int count;  //数量
};//顺序表结构体
typedef struct {Goods *elem;//顺序表首地址int length;
} SqlList; //商品表 typedef struct {OrderItem *elem;int length;
} OrderSqlList; //订单表 //顺序表的初始化
status InitListSq(SqlList &L);
status InitOListSq(OrderSqlList &L);//根据id,name查询商品
int locateElem_Sq(SqlList &L, string id);int Find_Name(SqlList &L, string name) ;//商品上架
status ListInsert(SqlList &L, Goods g);//添加订单
status ListOInsert(OrderSqlList &L, OrderItem o);//商品的销售  修改goods库存
int ListUpdate(SqlList &L, string id, int count);//打印
void PrintAllGoods(SqlList &L);
void PrintOrder(OrderSqlList &L);//保存
void Save_Disk(SqlList &L);
void Save_Order_Disk(OrderSqlList &L);

main.cpp

#include<iostream>
#include "shop.h"int main() {SqlList L;OrderSqlList O; int i = 0;int temp, a, c, choose = -1;double price;Goods e;OrderItem o;double total = 0;              //订单总应付价格 string hand_1, hand_2, hand_3, hand_4, hand_5;cout << "********************************************************" << endl;cout << "*                  商品销售管理系统菜单                *" << endl;cout << "********************************************************" << endl;cout << "*                                                      *" << endl;cout << "*      1、初始化  2、录入商品信息  3、商品查询         *" << endl;cout << "*                                                      *" << endl;cout << "*  4、商品上架  5、商品销售  6、浏览所有商品  7、退出  *" << endl;cout << "*                                                      *" << endl;cout << "********************************************************" << endl;while (choose!=0) {cout << "请输入操作项【0-7】:";cin >> choose;switch (choose) {case 1: {//创建顺序表if (InitListSq(L) && InitOListSq(O)) {cout << "初始化成功！" << endl;} else {cout << "初始化失败！" << endl;}break;}case 2: {    // 顺序表信息录入int i = 0;L.elem = new Goods[MAXSIZE];if (!L.elem) {exit(OVERFLOW);}L.length = 0;fstream FilePtr;FilePtr.open("e:/goods.txt");if (!FilePtr) {    //容错判断！！！ cout << "文件读取失败！" << endl;exit(ERROR0);}//跳过文件中 第一行表头FilePtr >> hand_1 >> hand_2 >> hand_3>> hand_4 >> hand_5;while (!FilePtr.eof()) {FilePtr >> L.elem[i].id >> L.elem[i].name >> L.elem[i].price >> L.elem[i].producer >> L.elem[i].store;i++;}cout << "信息导入成功！" << endl;L.length = i;FilePtr.close();break;}case 3: { //查找string name;printf("请输入查找名称:");cin>>name;int index = Find_Name(L,name);if(index>=0) {//cout<<"您要查找的书籍"<<name<<"价格为:"<<L.elem[index].price<<endl<<endl;cout <<"查找到商品编号:"<<L.elem[index].id<<",名称:"<<L.elem[index].name<<",价格:"<<L.elem[index].price<<",生产商:"<<L.elem[index].producer<<",库存数:"<<L.elem[index].store<<endl;} else {printf("查找不存在！\n");}break;}case 4: {// 插入图书string id,name,pr;double p;int index,s;printf("请输入编码:");cin>>id;printf("请输入名称:");cin>>name;printf("请输入单价:");cin>>p;printf("请输入生产商:");cin>>pr;printf("请输入库存:");cin>>s;e.id = id;e.name = name;e.price = p;e.producer = pr;e.store = s;int state = ListInsert(L, e);if(state == ERROR2) {printf("存储位置已满！上架商品失败\n");} else {printf("成功存入!\n");}break;}case 5: {string buy;while(buy!="n") {string id; //idint c; //countcout << "请输入购买编号" << endl;cin>>id;cout << "请输入购买数量" << endl;cin>>c;//scanf("%s %d",&id,&c);              if(ListUpdate(L, id, c)) {                      cout << "购买成功！" << endl;}int index = locateElem_Sq(L, id);if(index>=0) {cout <<"商品编号:"<<L.elem[index].id<<",名称:"<<L.elem[index].name<<",价格:"<<L.elem[index].price<<",生产商:"<<L.elem[index].producer<<",库存数:"<<L.elem[index].store<<endl;} else {printf("查找不存在！\n");}o.id = id;o.name = L.elem[index].name;o.price = L.elem[index].price;o.count = c;int state = ListOInsert(O, o);if(state == ERROR2) {printf("存储位置已满！添加订单失败\n");} else {cout << "成功加入订单！" << endl;total+= o.price*o.count;cout << "********************************************************" << endl;cout << "总价："<< total << endl; PrintOrder(O);cout << "********************************************************" << endl;cout << "是否继续购买？y/n" << endl;cin >> buy;                   }                                                                   }                           break;}                         case 6: {PrintAllGoods(L);cout << "打印完成！" << endl;break;}case 7: {cout << "************生成的销售单****************" << endl;PrintOrder(O);    cout << "需付总额为"<< total << endl; cout << "****************************************" << endl;                  Save_Disk(L);Save_Order_Disk(O);                printf("感谢使用！\n");return 0;}}}return 0;
}

shop_manager.cpp

#include "shop.h"//顺序表的初始化 商品
status InitListSq(SqlList &L) {L.elem = new Goods[MAXSIZE];    //申请100个数组if(!L.elem) {// 内存申请失败，直接退出程序exit(OVERFLOW);}L.length = 0;        //初始return OK;
};// 初始化 order
status InitOListSq(OrderSqlList &L) {L.elem = new OrderItem[MAXSIZE];  //申请100个数组if(!L.elem) {// 内存申请失败，直接退出程序exit(OVERFLOW);}L.length = 0;        //初始return OK;
};//查询 下标
int locateElem_Sq(SqlList &L, string e) { // 根据id查询 for(int i = 0; i < L.length; i++) {if(L.elem[i].id == e) {return i ;}}return 0;
}int Find_Name(SqlList &L, string name) { // 根据name查询 for(int i = 0; i < L.length; i++) {if(L.elem[i].name == name) {return i ;}}return -1;
}status ListInsert(SqlList &L, Goods g) { // 商品上架 if(L.length == MAXSIZE) return ERROR2;L.elem[L.length] = g;++L.length;return OK;
}status ListOInsert(OrderSqlList &L, OrderItem o) { // 添加至订单 if(L.length == MAXSIZE) return ERROR2;L.elem[L.length] = o;++L.length;return OK;
}int ListUpdate(SqlList &L, string id, int count) { //修改商品库存 for(int i = 0; i < L.length; i++) {if(L.elem[i].id == id) {L.elem[i].store -= count;} }return 1;
} //打印
void PrintAllGoods(SqlList &L) { //打印商品 for(int i=0;i<L.length;i++) {cout <<"商品编号:"<<L.elem[i].id<<",名称:"<<L.elem[i].name<<",价格:"<<L.elem[i].price<<",生产商:"<<L.elem[i].producer<<",库存数:"<<L.elem[i].store<<endl;}
}void PrintOrder(OrderSqlList &L) { //打印订单 for(int i=0;i<L.length;i++) {cout <<"商品编号:"<<L.elem[i].id<<",名称:"<<L.elem[i].name<<",单价"<<L.elem[i].price<<",购买数量:"<<L.elem[i].count<<endl;}
}void Save_Disk(SqlList &L) { //保存goods文件 fstream Fileout("e:/goods.txt",ios::out);if (!Fileout) {cout << "文件写入失败！" << endl;exit(ERROR0);}Fileout<<"id " <<"name "<<"price "<<"producer "<<"store"<<endl;for(int i = 0; i < L.length; ++i) {Fileout<<L.elem[i].id<<' '<<L.elem[i].name<<' '<<L.elem[i].price<<' '<<L.elem[i].producer<<' '<<L.elem[i].store<<endl;   }Fileout.close();return;
}void Save_Order_Disk(OrderSqlList &L) { //保存订单至磁盘fstream Fileout("e:/order.txt",ios::out);if (!Fileout) {cout << "订单文件写入失败！" << endl;exit(ERROR0);}Fileout<<"id " <<"name "<<"count "<<"price"<<endl;for(int i = 0; i < L.length; ++i) {Fileout<<L.elem[i].id<<' '<<L.elem[i].name<<' '<<L.elem[i].count<<' '<<L.elem[i].price<<endl;     }Fileout.close();return;
}

【运行结果】