Department store billing system with files

Assumptions: the store's items (code, name, price) are saved in items.dat. For a bill, the user enters each item's code and quantity; the program reads the item from the file and prints a formatted bill using manipulators.

#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;

class Item {
    int code;
    char name[20];
    float price;
public:
    void getData() { cout << "Code, Name, Price: "; cin >> code >> name >> price; }
    int getCode() { return code; }
    float getPrice() { return price; }
    const char* getName() { return name; }
};

int main() {
    Item it;
    int n;
    cout << "How many items to store? ";
    cin >> n;
    ofstream fout("items.dat", ios::binary);
    for (int i = 0; i < n; i++) {            // store data
        it.getData();
        fout.write((char*)&it, sizeof(it));
    }
    fout.close();

    int m, code, qty;
    float total = 0;
    cout << "Number of items purchased: ";
    cin >> m;

    cout << "\n" << left << setw(8) << "Code" << setw(15) << "Item"
         << right << setw(6) << "Qty" << setw(10) << "Rate"
         << setw(12) << "Amount" << endl;
    cout << setfill('-') << setw(51) << "" << setfill(' ') << endl;

    for (int i = 0; i < m; i++) {
        cin >> code >> qty;
        ifstream fin("items.dat", ios::binary);   // retrieve
        while (fin.read((char*)&it, sizeof(it))) {
            if (it.getCode() == code) {
                float amt = qty * it.getPrice();
                total += amt;
                cout << left << setw(8) << code << setw(15) << it.getName()
                     << right << setw(6) << qty
                     << setw(10) << fixed << setprecision(2) << it.getPrice()
                     << setw(12) << amt << endl;
                break;
            }
        }
        fin.close();
    }
    cout << setfill('-') << setw(51) << "" << setfill(' ') << endl;
    cout << left << setw(39) << "Total" << right << setw(12) << total << endl;
    return 0;
}

Sample bill (the typed code and quantity lines are not shown):

Code    Item              Qty      Rate      Amount
---------------------------------------------------
101     Soap                2     35.00       70.00
102     Rice                5     90.00      450.00
---------------------------------------------------
Total                                        520.00