cafe

.cpp

#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;

ifstream cinFile;
ofstream coutFile;

int n, a, b, c, somon, bien = 0;

struct menu
{
	int stt;
	string ten;
	long gia;
};
menu mang[100];

void nhapmenu()
{
	int somon;
	cout << "Nhap menu: " << endl;
	cout << "So mon can nhap la: ";
	cin >> somon;
	for (int i = 1; i <= somon; i++)
	{
		cout << "Nhap ten mon: ";
		fflush(stdin);
		getline(cin, mang[i].ten);
		cout << "Nhap gia: ";
		cin >> mang[i].gia;
		mang[i].stt = i;
		coutFile << mang[i].stt << " " << mang[i].ten << "\t" << mang[i].gia << endl;
	}
	coutFile.close();
}

void chonmon()
{
	//doc so thu tu khach hang
	int khachhang;
	cinFile.open("khachhang.txt");
	while (!cinFile.eof())
	{
		cinFile >> khachhang;
	}
	cinFile.close();
	coutFile.open("khachhang.txt", ios::out | ios::app);
	coutFile << khachhang + 1 << endl;
	coutFile.close();
	//chon mon
	int sttmon;
	int somoncangoi;
	string xuatten = "Ten mon";
	int xuatstt = 0;
	long xuatgia = 0;
	cout << "Menu gom co: \n";
	cinFile.open("menu.txt");
	int i = 1;
	while (!cinFile.eof())
	{
		cout << xuatstt << "\t" << xuatten << "\t" << xuatgia << endl;
		cinFile >> xuatstt >> xuatten >> xuatgia;
		mang[i].stt = xuatstt;
		mang[i].ten = xuatten;
		mang[i].gia = xuatgia;
		i++;
	}
	cinFile.close();
	stringstream sstr;
	sstr << khachhang;
	string stt_donhang = sstr.str();
	if (khachhang<10)
		coutFile.open("000" + stt_donhang + ".txt");
	else if (khachhang <100)
		coutFile.open("00" + stt_donhang + ".txt");
	else if (khachhang <1000)
		coutFile.open("0" + stt_donhang + ".txt");
	else coutFile.open(stt_donhang + ".txt");
	cout << "So mon ban muon goi la: ";
	cin >> somoncangoi;
	for (int i = 0; i<somoncangoi; i++)
	{
		cout << "Ban chon mon co stt: ";
		cin >> sttmon;
		coutFile << i + 1 << "\t" << mang[sttmon].ten << "\t" << mang[sttmon].gia << endl;
	}
	coutFile.close();
}

void inhoadon()
{
	int madonhang;
	int stt = 0;
	string ten = "Ten";
	long gia = 0;
	long tong = 0;
	cout << "Nhap ma don hang: ";
	cin >> madonhang;
	stringstream sstr;
	sstr << madonhang;
	string stt_donhang = sstr.str();
	if (madonhang<10) {
		cinFile.open("000" + stt_donhang + ".txt", ios::in);
		coutFile.open("Hoadon_000" + stt_donhang + ".txt", ios::out);
	}
	else if (madonhang <100) {
		cinFile.open("00" + stt_donhang + ".txt", ios::in);
		coutFile.open("Hoadon_00" + stt_donhang + ".txt", ios::out);
	}
	else if (madonhang <1000) {
		cinFile.open("0" + stt_donhang + ".txt", ios::in);
		coutFile.open("Hoadon_0" + stt_donhang + ".txt", ios::out);
	}
	else {
		cinFile.open(stt_donhang + ".txt", ios::in);
		coutFile.open("Hoadon_" + stt_donhang + ".txt", ios::out);
	}
	while (!cinFile.eof())
	{
		coutFile << stt << "\t" << ten << "\t" << gia << endl;
		tong = tong + gia;
		cinFile >> stt >> ten >> gia;
	}
	cinFile.close();
	coutFile << "Tong:\t \t" << tong;
	coutFile.close();
	cout << "Da in hoa don!" << endl;
}

int main()
{
	cout << "Cac tinh nang: " << endl;
	cout << "\t 1.Nhap menu: " << endl;
	cout << "\t 2.Chon mon: " << endl;
	cout << "\t 3.In hoa don: " << endl;
	cout << "Ban chon: ";
	cin >> n;
	switch (n)
	{
	case 1: {
		nhapmenu();
		break;
	}
	case 2: {
		chonmon();
		break;
	}
	case 3: {
		inhoadon();
		break;
	}
	}
	system("pause");
}