商品销售系统

/*在实现功能中，主要使用迭代器（迭代器（iterator）是一种对象，它能够用来遍历标准模板库容器中的部分或全部元素，每个迭代器对象代表容器中的确定的地址。迭代器修改了常规指针的接口，所谓迭代器是一种概念上的抽象：那些行为上像迭代器的东西都可以叫做迭代器。然而迭代器有很多不同的能力，它可以把抽象容器和通用算法有机的统一起来。
迭代器提供一些基本操作符：*、++、==、!=、=。这些操作和C/C++“操作array元素”时的指针接口一致。不同之处在于，迭代器是个所谓的复杂的指针，具有遍历复杂数据结构的能力。其下层运行机制取决于其所遍历的数据结构。因此，每一种容器型别都必须提供自己的迭代器。事实上每一种容器都将其迭代器以嵌套的方式定义于内部。因此各种迭代器的接口相同，型号却不同。这直接导出了泛型程序设计的概念：所有操作行为都使用相同接口，虽然它们的型别不同。）*/

//头文件
#ifndef  GOODS_H

#define GOODS_H

#include <iostream>

#include <string>

#include <list>

#include <fstream>

using namespace std;

class Goods{

protected:

int number;

string name;

float price;

list<Goods> goodslist;

list<Goods>::iterator iter;

 

public:

Goods(){};

Goods(int n,string nam,float p);

void addGoods();

void showGoods();

void menu();

void returnmenu();

void saveGoodsFile();

void eraseGoodsFile();

int getnumber(){return number;};

string getname(){return name;};

float getprice(){return price;};

void modifyGoods();

void saveGoodsfile();

void readGoodsfile();

};

#endif


//源文件
#include "stdafx.h"

#include "gq.h"



Goods::Goods(int n,string nam,float p)

{

number=n;

name=nam;

price=p;

}

 
//添加函数
void Goods::addGoods()

{

system("cls");

//cout<<"请输入商品编号:"<<endl;

//cin>>number;

number=goodslist.size();

cout<<"请输入商品名称:"<<endl;

cin>>name;

cout<<"请输入商品价格:"<<endl;

cin>>price;

 

goodslist.push_back(Goods(++number,name,price));

 

cout<<"添加商品成功！输入Q继续，输入W返回主菜单。"<<endl;

char h=0;

while ("h!=Q"&&"h!=W")

{
cin>>h;

if (h=='Q')

addGoods();

else 

if (h=='W')

menu();

else 

cout<<"您的输入有误，请重新输入："<<endl;

}

}

 
//显示函数
void Goods::showGoods()

{

system("cls");

cout<<"商品信息"<<endl;

cout<<"编号\t"<<"商品名称\t"<<"价格"<<endl;

for (iter=goodslist.begin();iter!=goodslist.end();++iter)

cout<<iter->getnumber()<<"\t"<<iter->getname()<<"\t\t"<<iter->getprice()<<endl;

cout<<"按W返回主菜单..."<<endl;

returnmenu();

}


//菜单函数
void Goods::menu()

{

system("cls");

cout<<"欢迎使用销售系统"<<endl;

cout<<"1.添加商品"<<endl;

cout<<"2.显示商品"<<endl;

cout<<"3.退出系统"<<endl;

cout<<"4.删除商品"<<endl;

cout<<"5.修改商品"<<endl;

cout<<"6.购买商品"<<endl;

cout<<"7.显示库存"<<endl;

cout<<"8.销售商品"<<endl;

cout<<"请输入您的选项：";

}


//删除函数
void Goods::eraseGoodsFile()

{   system("cls");

int ID;

cout<<"请输入要删除的ID："<<endl;

cin>>ID;

for (iter=goodslist.begin();iter!=goodslist.end();++iter)

 

if (ID==iter->getnumber())

{

iter=goodslist.erase(iter);

cout<<"您已删除成功!按W返回主菜单..."<<endl;

break;

}

returnmenu();

}

 
//修改函数
void Goods::modifyGoods()

{

system("cls");

int X;

string N;

float P;

cout<<"请输入您需要更改的商品编号："<<endl;

cin>>X;

for(iter=goodslist.begin();iter!=goodslist.end();++iter)

if (X==iter->getnumber())

{

iter=goodslist.erase(iter);

cout<<"请输入新商品名称"<<endl;

cin>>N;

cout<<"请输入新商品价格："<<endl;

cin>>P;

goodslist.insert(iter,Goods(X,N,P));

cout<<"您已修改成功！按W返回主菜单..."<<endl;

break;

}

returnmenu();

}

 
//保存函数
void Goods::saveGoodsfile()

{

ofstream outfile;

outfile.open("gq.txt");

if(outfile.fail())

cout<<"您未保存成功..."<<endl;

else

for(iter=goodslist.begin();iter!=goodslist.end();++iter)

outfile<<iter->getnumber()<<"\t"<<iter->getname()<<"\t"<<iter->getprice()<<endl;

outfile.close( );

}

//读取函数
void Goods::readGoodsfile()

{

int nX;string nN;float nP;

ifstream fin;

fin.open("gq.txt");

if(fin.fail())

cout<<"读入文件失败！"<<endl;

else

while(!fin.eof())

{

fin>>nX>>nN>>nP;

goodslist.push_back(Goods(nX,nN,nP));

}


}

//返回函数
void Goods::returnmenu()

{

char h=0;

while (h!='W')

{

cin>>h;

if (h=='W')

menu();

else 

cout<<"您的输入有误，请重新输入："<<endl;

}

}

//继承类
//头文件
#ifndef BuyGoods_H

#define BuyGoods_H

#include <time.h>

#include "gq.h"

class BuyGoods:public Goods

{

protected:

long goodsamount;

long double totalmoney;

string Stime;

int sellID;

list<BuyGoods> buygoodslist;

list<BuyGoods>::iterator itera;

public:

BuyGoods(){};

BuyGoods(int sID,int num,string nam,float pri,long ga,long double tm,string tim);

int getgoodsamount(){return goodsamount;};

long double gettotalmoney(){return totalmoney;};

int getSellID(){return sellID;};

string getTime(){return Stime;};

void switch_while();

void showbuygoods();

void savebuyGoodsFile();

void readbuyGoodsfile();

string setTime();

void purchaseGoods();

void sellbuygoods();

};

#endif

//源文件
#include "stdafx.h"

#include "jc.h"


//购买商品函数
BuyGoods::BuyGoods(int sID,int num,string nam,float pri,long ga,long double tm,string tim)

{

sellID=sID;

number=num;

name=nam;

price=pri;

goodsamount=ga;

totalmoney=tm;

Stime=tim;

}

//选择函数
void BuyGoods::switch_while()

{

while (1)

{

cout<<"请输入选项:"<<endl;

int x;

cin>>x;

switch (x)

{

case 1:addGoods();

break;

case 2:showGoods();

break;

case 3: saveGoodsfile();

savebuyGoodsFile();

exit(0);

break;

case 4:eraseGoodsFile();

break;

case 5:modifyGoods();

break;

case 6:purchaseGoods();

break;

case 7:showbuygoods();

break;

case 8:sellbuygoods();

break;

default:cout<<"您的输入有误！请重新输入。"<<endl;

break;

}

}

}

 
//显示购买的函数
void BuyGoods::showbuygoods()

{

system("cls");

cout<<"库存信息"<<endl;

cout<<"单号\t编号\t名称\t价格\t数量\t金额\t时间"<<endl;

for (itera=buygoodslist.begin();itera!=buygoodslist.end();++itera)

cout<<itera->getSellID()<<"\t"<<itera->getnumber()<<"\t"<<itera->getname()<<"\t"<<itera->getprice()

<<"\t"<<itera->getgoodsamount()<<"\t"<<itera->gettotalmoney()<<"\t"<<

itera->getTime()<<endl;

cout<<"按W返回主菜单..."<<endl;

char h=0;

while (h!='W')

{

cin>>h;

if (h=='W')

 

menu();

else 

cout<<"您的输入有误，请重新输入："<<endl;

 

}

}
 
//保存已买货物函数
void BuyGoods::savebuyGoodsFile()

{

ofstream outfile;

outfile.open("jc.txt");

if(outfile.fail())

cout<<"保存文件失败！"<<endl;

else

for(itera=buygoodslist.begin();itera!=buygoodslist.end();++itera)

outfile<<itera->getSellID()<<"\t"<<itera->getnumber()<<"\t"<<itera->getname()<<"\t"<<itera->getprice()

<<"\t"<<itera->getgoodsamount()<<"\t"<<itera->gettotalmoney()<<"\t"<<itera->getTime()<<endl;

outfile.close( );

}

 
//查看已买货物函数
void BuyGoods::readbuyGoodsfile()

{

int nsID;int nnum;string nnam;float npri;long nga;long double ntm;string ntim,ntim1;

 

ifstream fin;

fin.open("jc.txt");

if(fin.fail())

cout<<"打开文件失败！"<<endl;

else

while(!fin.eof())

{

fin>>nsID>>nnum>>nnam>>npri>>nga>>ntm>>ntim>>ntim1;

ntim.append(ntim1);

buygoodslist.push_back(BuyGoods(nsID,nnum,nnam,npri,nga,ntm,ntim));

}

}

 
//查看货物信息函数
void BuyGoods::purchaseGoods()

{

system("cls");

cout<<"商品信息"<<endl;

cout<<"编号\t"<<"商品名称\t"<<"价格"<<endl;

for (iter=goodslist.begin();iter!=goodslist.end();++iter)

cout<<iter->getnumber()<<"\t"<<iter->getname()<<"\t\t"<<iter->getprice()<<endl;

cout<<"请输入您要购买的货物编号："<<endl;

int z,sID;

string nam,tim;

float pri;

long ga;

bool k=0;

while(!k)

{ cin>>z;

if (z>=0&&z<=goodslist.size())

k=1;

else

cout<<"您的输入有误，请重新输入..."<<endl;

 

}

for (iter=goodslist.begin();iter!=goodslist.end();++iter)

if (z==iter->getnumber())

{

nam=iter->getname();

pri=iter->getprice();

break;

}

 

cout<<"请输入您要购买的数量："<<endl;

cin>>ga;

sID=buygoodslist.size()+1;

tim=setTime();

buygoodslist.push_back(BuyGoods(sID,z,nam,pri,ga,pri*ga,tim));

cout<<"购买"<<nam<<"数量为"<<ga<<"成功！"<<endl;

cout<<"按W返回主菜单..."<<endl;

returnmenu();

}

 
//售出商品函数
void BuyGoods::sellbuygoods()

{

system("cls");

cout<<"库存信息"<<endl;

cout<<"编号\t名称\t价格\t数量\t金额"<<endl;

for (itera=buygoodslist.begin();itera!=buygoodslist.end();++itera)

cout<<itera->getnumber()<<"\t"<<itera->getname()<<"\t"<<itera->getprice()

<<"\t"<<itera->getgoodsamount()<<"\t"<<itera->gettotalmoney()<<endl;

cout<<"请输入您要购买的货物编号："<<endl;

int z,sID;

string nam,tim;

float pri;

long ga,nga;

bool k=0;

while(!k)

{

cin>>z;

if (z>=0&&z<=goodslist.size())

k=1;

else

cout<<"您的输入有误，请重新输入..."<<endl;

 

}

for (itera=buygoodslist.begin();itera!=buygoodslist.end();++itera)

if (z==itera->getnumber())

{

sID=itera->getSellID();

nam=itera->getname();

pri=itera->getprice();

nga=itera->getgoodsamount();

tim=itera->getTime();

 

cout<<"请输入您要购买的数量："<<endl;

bool l=0;

while (!l)

{

cin>>ga;

if(ga>0&&ga<=nga)

l=1;

else

cout<<"您的输入有误..."<<endl;

}

if (ga==nga)

 

itera=buygoodslist.erase(itera);

 

else

{

itera=buygoodslist.erase(itera);

buygoodslist.push_back(BuyGoods(sID,z,nam,pri,nga-ga,pri*(nga-ga),tim));

}

cout<<"购买"<<nam<<"数量为"<<ga<<"成功！"<<endl;

break;

}

else

cout<<"库存内没有您需要的商品..."<<endl;

cout<<"按W返回主菜单..."<<endl;

returnmenu();

 

}

 
//设置时间函数
std::string BuyGoods::setTime()

{

time_t t=time(0); 

char temp[70];

strftime(temp,sizeof(temp),"%Y年%m月%d日%c",localtime(&t));

string Dtime=temp;

return Dtime;

}

//主函数

#include "stdafx.h"

#include "gq.h"

#include "jc.h"

void main()

{

BuyGoods A;

A.menu();

A.readGoodsfile();

A.readbuyGoodsfile();

A.switch_while();

}