商品銷售系統

/*在實現功能中，主要使用迭代器（迭代器（iterator）是一種對象，它能夠用來遍歷標準模板庫容器中的部分或全部元素，每個迭代器對象代表容器中的確定的地址。迭代器修改了常規指針的接口，所謂迭代器是一種概念上的抽象：那些行爲上像迭代器的東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機的統一起來。
迭代器提供一些基本操作符：*、++、==、!=、=。這些操作和C/C++“操作array元素”時的指針接口一致。不同之處在於，迭代器是個所謂的複雜的指針，具有遍歷複雜數據結構的能力。其下層運行機制取決於其所遍歷的數據結構。因此，每一種容器型別都必須提供自己的迭代器。事實上每一種容器都將其迭代器以嵌套的方式定義於內部。因此各種迭代器的接口相同，型號卻不同。這直接導出了泛型程序設計的概念：所有操作行爲都使用相同接口，雖然它們的型別不同。）*/

//頭文件
#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;

}

 
//添加函數
void Goods::addGoods()

{

system("cls");

//cout<<"請輸入商品編號:"<<endl;

//cin>>number;

number=goodslist.size();

cout<<"請輸入商品名稱:"<<endl;

cin>>name;

cout<<"請輸入商品價格:"<<endl;

cin>>price;

 

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

 

cout<<"添加商品成功！輸入Q繼續，輸入W返回主菜單。"<<endl;

char h=0;

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

{
cin>>h;

if (h=='Q')

addGoods();

else 

if (h=='W')

menu();

else 

cout<<"您的輸入有誤，請重新輸入："<<endl;

}

}

 
//顯示函數
void Goods::showGoods()

{

system("cls");

cout<<"商品信息"<<endl;

cout<<"編號\t"<<"商品名稱\t"<<"價格"<<endl;

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

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

cout<<"按W返回主菜單..."<<endl;

returnmenu();

}


//菜單函數
void Goods::menu()

{

system("cls");

cout<<"歡迎使用銷售系統"<<endl;

cout<<"1.添加商品"<<endl;

cout<<"2.顯示商品"<<endl;

cout<<"3.退出系統"<<endl;

cout<<"4.刪除商品"<<endl;

cout<<"5.修改商品"<<endl;

cout<<"6.購買商品"<<endl;

cout<<"7.顯示庫存"<<endl;

cout<<"8.銷售商品"<<endl;

cout<<"請輸入您的選項：";

}


//刪除函數
void Goods::eraseGoodsFile()

{   system("cls");

int ID;

cout<<"請輸入要刪除的ID："<<endl;

cin>>ID;

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

 

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

{

iter=goodslist.erase(iter);

cout<<"您已刪除成功!按W返回主菜單..."<<endl;

break;

}

returnmenu();

}

 
//修改函數
void Goods::modifyGoods()

{

system("cls");

int X;

string N;

float P;

cout<<"請輸入您需要更改的商品編號："<<endl;

cin>>X;

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

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

{

iter=goodslist.erase(iter);

cout<<"請輸入新商品名稱"<<endl;

cin>>N;

cout<<"請輸入新商品價格："<<endl;

cin>>P;

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

cout<<"您已修改成功！按W返回主菜單..."<<endl;

break;

}

returnmenu();

}

 
//保存函數
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( );

}

//讀取函數
void Goods::readGoodsfile()

{

int nX;string nN;float nP;

ifstream fin;

fin.open("gq.txt");

if(fin.fail())

cout<<"讀入文件失敗！"<<endl;

else

while(!fin.eof())

{

fin>>nX>>nN>>nP;

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

}


}

//返回函數
void Goods::returnmenu()

{

char h=0;

while (h!='W')

{

cin>>h;

if (h=='W')

menu();

else 

cout<<"您的輸入有誤，請重新輸入："<<endl;

}

}

//繼承類
//頭文件
#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"


//購買商品函數
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;

}

//選擇函數
void BuyGoods::switch_while()

{

while (1)

{

cout<<"請輸入選項:"<<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<<"您的輸入有誤！請重新輸入。"<<endl;

break;

}

}

}

 
//顯示購買的函數
void BuyGoods::showbuygoods()

{

system("cls");

cout<<"庫存信息"<<endl;

cout<<"單號\t編號\t名稱\t價格\t數量\t金額\t時間"<<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返回主菜單..."<<endl;

char h=0;

while (h!='W')

{

cin>>h;

if (h=='W')

 

menu();

else 

cout<<"您的輸入有誤，請重新輸入："<<endl;

 

}

}
 
//保存已買貨物函數
void BuyGoods::savebuyGoodsFile()

{

ofstream outfile;

outfile.open("jc.txt");

if(outfile.fail())

cout<<"保存文件失敗！"<<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( );

}

 
//查看已買貨物函數
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<<"打開文件失敗！"<<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));

}

}

 
//查看貨物信息函數
void BuyGoods::purchaseGoods()

{

system("cls");

cout<<"商品信息"<<endl;

cout<<"編號\t"<<"商品名稱\t"<<"價格"<<endl;

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

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

cout<<"請輸入您要購買的貨物編號："<<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<<"您的輸入有誤，請重新輸入..."<<endl;

 

}

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

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

{

nam=iter->getname();

pri=iter->getprice();

break;

}

 

cout<<"請輸入您要購買的數量："<<endl;

cin>>ga;

sID=buygoodslist.size()+1;

tim=setTime();

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

cout<<"購買"<<nam<<"數量爲"<<ga<<"成功！"<<endl;

cout<<"按W返回主菜單..."<<endl;

returnmenu();

}

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

{

system("cls");

cout<<"庫存信息"<<endl;

cout<<"編號\t名稱\t價格\t數量\t金額"<<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<<"請輸入您要購買的貨物編號："<<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<<"您的輸入有誤，請重新輸入..."<<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<<"請輸入您要購買的數量："<<endl;

bool l=0;

while (!l)

{

cin>>ga;

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

l=1;

else

cout<<"您的輸入有誤..."<<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<<"購買"<<nam<<"數量爲"<<ga<<"成功！"<<endl;

break;

}

else

cout<<"庫存內沒有您需要的商品..."<<endl;

cout<<"按W返回主菜單..."<<endl;

returnmenu();

 

}

 
//設置時間函數
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;

}

//主函數

#include "stdafx.h"

#include "gq.h"

#include "jc.h"

void main()

{

BuyGoods A;

A.menu();

A.readGoodsfile();

A.readbuyGoodsfile();

A.switch_while();

}