void SaveData(String Fname, const DynamicArray<Data> &DataSet, mistakes &err)
{
    ofstream f;
    f.open(Fname.c_str(), ios::binary);
    if(!f.is_open())
    {
        err = openFileErr;
        f.close();
        return;
    }
    int count = DataSet.Length;
    try
    {
            f.write((char *)&count, sizeof(count));
        for(int i = 0; i < count; i++)
            f.write((char *)&DataSet[i], sizeof(DataSet[i]));
    }
    catch(...)
    {
        f.close();
        err = memAllocErr;
        return;
    }
    f.close();
}