void add_table(struct Table* t, const char* _code, const char* _name, const int _numb)
{
    for (int i = 0; i < current_num_tables; ++i)
    {
        if (!strcmp(_code, t[i].code)) {
            t[i].numb += _numb;
            return;
        }
    }

    strcpy(t[current_num_tables].code, _code);
    strcpy(t[current_num_tables].name, _name);
    t[current_num_tables].numb = _numb;
    current_num_tables++;
    return;
}