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

const int n = 20;

struct struct1
{
    int id;
    char name[10];
    double number;
    bool flag;
};

void main()
{
    int f1[n];
    double f2[n];
    for (int i = 0; i < n; i++)
        f1[i] = (rand() % 200) - 100;
    ofstream fout1("file1.bin", ios::binary);
    fout1.write((char*)&f1, sizeof(f1));
    fout1.close();

    ifstream fin1("file1.bin", ios::binary);
    fin1.read((char*)&f1, sizeof(f1));
    for (int i = 0; i < n; i++)
        f2[i] = f1[i] * 1.0 / ((rand() % 200) - 100);
    ofstream fout2("file2.bin", ios::binary);
    fout2.write((char*)&f2, sizeof(f2));
    fin1.close();
    fout2.close();

    ifstream fin2("file2.bin", ios::binary);
    struct1 str[n];
    cout << "Enter " << n << " name:";
    for (int i = 0; i < n; i++)
    {
        cin >> str[i].name;
        str[i].id = i + 1;
        str[i].number = f2[i];
        if (int(f2[i]) == f2[i])
            str[i].flag = true;
        else
            str[i].flag = false;
    }
    ofstream fout3("file3.bin", ios::binary);
    fout3.write((char*)&str, sizeof(str));
    fin2.close();
    fout3.close();

    ifstream fin3("file3.bin", ios::binary);
    fin3.read((char*)&str, sizeof(str));
    for (int i = 0; i < n; i++)
    {
        cout.width(5);
        cout << str[i].id;
        cout.width(10);
        cout << str[i].name;
        cout.width(15);
        cout << str[i].number;
        cout.width(10);
        cout << str[i].flag;
        cout << endl;
    }
    fin3.close();
    system("pause");
}