STL vector is nice class , which allows us to randomly access any location in the vector.
But if you use pointers to reference memory inside the vector , it can be dangerous depends upon the situation.
Consider this example, I have declared a std::vector object for storing some objects of "SomeClass".
// i am feeding the vector here... like Objects.push_back( .. )
After feeding the vector i just took the address of first object in the vector.
like SomeClass* pThink = &Objects;
This is fine and has no problems at all. But the problems will come if you keep feeding the vector or removing elements .. Because std::vector will always reorganizing memory .It make sure that the memory allocated for objects will be continous.
So if we refer the pointer 'pThink' after push/ remove functions , it can cause expcetion similar to pointing incorrect memory location etc.