string s;
s += to_string ("%d (%.2f) %c: ", (*this)[i].position_, (*this)[i].delta_y_,
((*this)[i].dir_ == UP ? 'u' : 'd'))
- + (*this)[i].card () + (*this).tie_card (i);
+ + (*this)[i].card () + tie_card (i);
/*
this is a little awkward, but we must decide where to put