#include <iostream>
#include <fstream>

using namespace std;

int main() {
    filebuf inFileBuf;

    if (inFileBuf.open("text.dat", ios_base::in) == nullptr) {
        cout << "File 'text.dat' is not existing";

        return 0;
    }

    istream inFileStream(&inFileBuf);

    while (true) {
        char c = inFileStream.get();

        if (c == EOF)
            break;

        cout << c;
    }



    inFileBuf.close();


    return 0;
}