Opening a file with fstream:

std::fstream fileStream(obj.path, std::ios::binary | std::ios::in | std::ios::out);

Next, I write data to the file:

fileStream << this->m_path;
fileStream << this->m_name;
fileStream << this->m_owner;

Opening the file, I see the data is not in binary form. Is this only possible using function write?

fileStream.write((char*)&m_owner, sizeof(std::string));