expl.cpp

#include <iostream>
#include <fstream>

using namespace std;

struct A1
{
    char* name;
    bool xex;
    int age;
    A1()
    {
        name = nullptr;
        xex = false;
        age = 0;
    }/*
    ~A1()
    {
        if (name != nullptr)
        {
            delete[] name;
        }
    }*/
    /*friend istream& operator >>(istream& in, A1& obj)
    {
        char* nameCopy = new char[20];
        in.getline(nameCopy, 20, ' ');
        obj.name = new char[strlen(nameCopy) + 1];
        strcpy_s(obj.name, strlen(nameCopy) + 1, nameCopy);
        delete[] nameCopy;
        char* surnameCopy = new char[20];
        in.getline(surnameCopy, 20, ' ');
        if (strcmp(surnameCopy, "true") == 0)
        {
            obj.xex = true;
        }
        else
        {
            obj.xex = false;
        }
        delete[] surnameCopy;
        in >> obj.age;
        in.get();
        return in;
    }*/
    //friend ostream& operator << (ostream& out, A1& obj)
    //{
    //  out << obj.name << " " /*<< obj.xex << */" " << obj.age << endl;
    //  return out;
    //}
};

class AA1
{
    int count;
    A1* arr;

public:
    AA1(int count_)
    {
        arr = new A1[count_];
        count = count_;
    }
    AA1()
    {
        arr = new A1;
        count = 1;
    }
    ifstream& ReadData(ifstream& in)
    {
        if (!in.is_open())
            throw "File is not opened!";
        if (!in)
            throw "File is empty!";
        int length, num;
        in.seekg(0, ios::end);
        length = (int)in.tellg();
        num = length / sizeof(A1);
        count = num;
        in.clear();
        in.seekg(0, ios::beg);
        delete[] arr;
        arr = new A1[num];
        in.read((char*)arr, length);
        return in;
    }
    ofstream& WriteData(ofstream& out)
    {
        if (!out) throw "Error!";
        out.write((char*)arr, sizeof(A1) * count);
        return out;
    }
};



int main()
{
    try
    {
        ifstream in("text.bin", ios::in | ios::binary);
        ofstream out("text1.txt", ios::out | ios::binary);
        AA1 obj;
        obj.ReadData(in);
        obj.WriteData(out);
    }
    catch (const char* str)
    {
        cout << str << endl;
    }
    system("pause");
    return 0;
}