So far I have no problems, than program continues, I call some members functions of one of the shapes using a syntax like this:
two_shapes[ 1 ]->show();
In the mean time, I don't touch ... Wait,
ZERO INDEXING!
(So, I have solved my problem myself, but I found it kind of funny the way I realized my problem while I was asking about it, so still wanted to post this. It can be deleted if it is against the rules.)