бинарные файлы

#include <iostream>
#include <stdio.h>
#include <fstream>
using namespace std;
struct date
{
    int day;
    int month;
    int year;
};
struct candy
{
    int code;
    int manufactury_code;
    date date_production;
    int shelf_life;
    int taste;
    int filling;
    int calorie;
    int rus;
    date end_shelf;
};
candy* create(ifstream &f, int n)
{
    int i;
    char*data = new char[10];
    candy* a = new candy[n];
    for (i = 0; i < n; i++)
    {
        f >> a[i].code >> a[i].manufactury_code;
        f >> data;
        a[i].date_production.day = (int(data[0]) - 48) * 10 + int(data[1]) - 48;
        a[i].date_production.month = (int(data[3]) - 48) * 10 + int(data[4]) - 48;
        a[i].date_production.year = (int(data[6]) - 48) * 1000 + (int(data[7]) - 48) * 100 + (int(data[8] - 48)) * 10 + int(data[9] - 48);
        f >> a[i].shelf_life >> a[i].taste >> a[i].filling >> a[i].calorie >> a[i].rus;
        a[i].end_shelf.day = a[i].date_production.day;
        a[i].end_shelf.month = a[i].date_production.month + a[i].shelf_life;
        a[i].end_shelf.year = a[i].date_production.year;
        while (a[i].end_shelf.month > 12)
        {
            a[i].end_shelf.month -= 12;
            a[i].end_shelf.year += 1;
        }
    }
    return a;
}
bool compare(date candies, date today)
{
    if (candies.year > today.year)
        return false;
    else
        if (candies.year < today.year)
            return true;
        else
            if (candies.month > today.month)
                return false;
            else
                if (candies.month < today.month)
                    return true;
                else
                    if (candies.day >= today.day)
                        return false;
                    else
                        return true;
}
void cTerm(candy* a, date daynow, int n, ofstream &out)
{
    int i, k = 0;
    for (i = 0; i < n; i++)
        if (compare(a[i].end_shelf, daynow))
        {
            out.write((char*)&a[i].code, sizeof(a[i].code));
            out.write((char*)&a[i].manufactury_code, sizeof(a[i].manufactury_code));
            out.write((char*)&a[i].end_shelf, sizeof(a[i].end_shelf));
            k++;
        }
    cout << k << endl;
}
void cSortCalories(candy* a, int n, ofstream &out)
{
    int i, j;
    candy t;
    for (i = 0; i < n; i++)
        for (j = 0; j < n - 1; j++)
            if (a[j].calorie < a[j + 1].calorie)
            {
                t = a[j];
                a[j] = a[j + 1];
                a[j + 1] = t;
            }
    for (i = 0; i < n; i++)
    {
        out.write((char*)&a[i].code, sizeof(a[i].code));
        out.write((char*)&a[i].manufactury_code, sizeof(a[i].manufactury_code));
        out.write((char*)&a[i].taste, sizeof(a[i].taste));
        out.write((char*)&a[i].calorie, sizeof(a[i].calorie));
    }
    cout << n << endl;
}
void cTaste(candy*a, int n, ofstream &out)
{
    int i;
    int k = 0;
    for (i = 0; i < n; i++)
        if ((a[i].rus == 1) && (a[i].taste > 80))
        {
            out.write((char*)&a[i].code, sizeof(a[i].code));
            out.write((char*)&a[i].manufactury_code, sizeof(a[i].manufactury_code));
            out.write((char*)&a[i].date_production, sizeof(a[i].date_production));
            out.write((char*)&a[i].shelf_life, sizeof(a[i].shelf_life));
            out.write((char*)&a[i].taste, sizeof(a[i].taste));
            out.write((char*)&a[i].filling, sizeof(a[i].filling));
            out.write((char*)&a[i].calorie, sizeof(a[i].calorie));
            out.write((char*)&a[i].rus, sizeof(a[i].rus));
            k++;
        }
    cout << k << endl;
}
void cFilling(candy*a, int n, ofstream &out)
{
    int i;
    int k = 0;
    for (i = 0; i < n; i++)
        if ((a[i].taste > 0) && (a[i].taste < 50) && (a[i].filling % 3 == 0))
        {
            out.write((char*)&a[i].code, sizeof(a[i].code));
            out.write((char*)&a[i].manufactury_code, sizeof(a[i].manufactury_code));
            out.write((char*)&a[i].date_production, sizeof(a[i].date_production));
            out.write((char*)&a[i].taste, sizeof(a[i].taste));
            out.write((char*)&a[i].filling, sizeof(a[i].filling));
            k++;
        }
    cout << k << endl;
}

int main()
{
    ifstream inputcandy("inputcandy.txt");
    ofstream out1("output1.bin", ios::binary);
    ofstream out2("output2.bin", ios::binary);
    ofstream out3("output3.bin", ios::binary);
    ofstream out4("output4.bin", ios::binary);
    int n;
    cout << "Enter number of candies: ";
    cin >> n;
    candy*a = create(inputcandy, n);
    char*b = new char[10];
    date daynow;
    cout << "Enter today's date: ";
    cin >> b;
    daynow.day = (int(b[0]) - 48) * 10 + int(b[1]) - 48;
    daynow.month = (int(b[3]) - 48) * 10 + int(b[4]) - 48;
    daynow.year = (int(b[6]) - 48) * 1000 + (int(b[7]) - 48) * 100 + (int(b[8] - 48)) * 10 +
        int(b[9] - 48);
    cTerm(a, daynow, n, out1);
    cSortCalories(a, n, out2);
    cTaste(a, n, out3);
    cFilling(a, n, out4);
    inputcandy.close();
    out1.close();
    out2.close();
    out3.close();
    out4.close();

    return 0;
}