Thread: Dynamic memory allocation

Hey!
I was reading about dynamic memory allocation, and I don't quite get the purpose of it. It says, you can create pointer to an array you don't know the size
of yet. Why not create an array during rutime, using a variable as a size?
Below is an example of what I mean.

With dynamic array:

Code:

int v, *dynarr;
cin >> v;
cin.ignore();
dynarr = new int [v];
cout<<"\n";
for (int x = 0; x<v; x++){
    dynarr[x]=v;
    cout << dynarr[x];
}

Without:

Code:

int v;
cin >> v;
cin.ignore();
int dynarr[v];
cout<<"\n";
for (int x = 0; x<v; x++){
    dynarr[x]=v;
    cout << dynarr[x];
}

Those two pieces of code do the same thing, so what is the advantage of creating a pointer to an array again?