字符串操作-读取文本至字符串

string MyStr::readstring1(const char*path)
{
    ifstream file;
    file.open(path, ios::in);//读文件ios::in ios::binary 
    file.seekg(0, ios::end);
    std::streamoff filelen = file.tellg();
    file.seekg(0, ios::beg);
    char *ncfiles = nullptr;
    ncfiles = new char[filelen + 1]();
    //file >> noskipws; 
    file.read(ncfiles, filelen);
    file.clear();
    file.close();
    string a;
    a = ncfiles;
    if (ncfiles)
    {
        delete[]ncfiles;
        ncfiles = nullptr;
    }
    return a;
}