Building data base, read method

Question

Can anyone why this code does not work? It says that this operator does not exists or something like that. Please help me

void Account::read_rec()
{
    std::ifstream infile;
    infile.open("record.bank", std::ios::binary);
    if (!infile)
    {
        std::cout << "[Error] File Not Found!" << std::endl;
        return;
    }

    std::cout << "\n***** Data from file *****" << std::endl;

    while (!infile.eof())
    {
        if (infile.read(reinterpret_cast<char*>(this), sizeof(*this) > 0))
        {
            show_data();
        }
    }
    infile.close();
}

**Recommended reading:** [Why is iostream::eof inside a loop condition considered wrong?](https://stackoverflow.com/q/5605125/560648) — Lightness Races in Orbit, Jan 23 '19 at 19:02
Also you have to be really careful if you want to serialise/deserialise in a byte-by-byte way like this. There are stringent constraints. Usually we create more sophisticated serialisation/deserialisation logic... — Lightness Races in Orbit, Jan 23 '19 at 19:02

score 2 · Answer 1 · answered Jan 23 '19 at 19:00

if (infile.read(reinterpret_cast<char*>(this), sizeof(*this) > 0))
//                                                          ^   ^
//                                                          A   B

The end of the read function call should be at A, not at B.

You put the bracket in the wrong place.

There is no read(char*, bool) function ;)

Building data base, read method

1 Answers1