Lets say I do
char *a; a = new char[4]; Now, is it possible to extend the size of the array further?
Say I want to keep any values I put inside a[0] to a[3] but now I want more space for a[4] and a[5] etc. Is that possible in C++?
At first I felt like maybe I could just make:
char* a[10]; a[0] = new char[size]; Whenever more space is needed I can go to a[1] and allocate more space. This is the only alternative I can think of at the moment.
Unfortunately it's not possible in C++. You have to allocate a new area and copy the old into the new.
However, C++ have other facilities, like std::vector, that alleviates the need to manually handle these things.
std::deque can avoid reallocations.
Instead of char* a , you can use char** a;
i.e.
char** a = new char*[4]; for(int i=0; i<4; i++) (*a)[i] = new char(i); /* feed values to array */ /* now you need a[4]? no problem */ char tmp = (*a)[3]; a[3] = new char[2]; a[3][0] = tmp; a[3][1] = xyz; /* this is you a[4] */ Though this is a work around, I would suggest to used vector.
