Question

I have a class with a vector of pointers to objects. I’ve introduced some elements on this vector, and on my main file I’ve managed to print them and add others with no problems. Now I’m trying to remove an element from that vector and check to see if it’s not NULL but it is not working.

I’m filling it with on class Test:

Other *a = new Other(1,1);
Other *b = new Other(2,2);
Other *c = new Other(3,3);

v->push_back(a);
v->push_back(b);
v->push_back(c);

And on my main file I have:

Test t;
(...)

Other *pointer = t.vect->at(0);

delete t.vect->at(0);
t.vect->erase(t.vect->begin());

if (pointer == NULL) { cout << "Nothing here.."; } // Never enters here..

Answer 1

The deletion of memory pointed by a pointer, doesn’t set the pointer to NULL.