How can strings be allocated in the heap using pointers. Strings can have variable size then how can they given a space in heap?

Question

Like suppose yoy want to store the names of guest coming to your party.
int guest_num;
Int *gsts;
Cin>>guest_num;
Gsts = new string[guest_num];

Now how will the computer allocate memory for strings who's size is not yet determined?

Answer 1

FYI, there's a problem with your code example. <gsts> variable in your example is an `int` pointer (assumed `int` although written as `Int`).

The C++ std::string is a template class fully capable for managing memory as necessary, it is far different to the plain `char` array which is the C string. Expanding and shrinking the buffer is done internally, as necessary.

How it works under the hood is far beyond my limited knowledge for understanding. I only have one word if I were to describe it "complex".

Answer 2

Thanks Ipang

Answer 3

You're welcome buddy 👌