Thread: Decariing arrays and dynamic memory

Hi There,

There was a time in which I used C daily, but that was like 10 years ago. Now Im back, and there is something that probably didn't change in this 10 years, but I cant really remember how it works. I searched in the forum but didn't find conclusive answer.

Question is:

When I first learnt programming C in borland, I'd been told that arrays can only be defined with constants:

Code:

int a[10];

or of course:

Code:

#define N 10
int a[N];

otherwise, you you had no other choise but using dynamic memory:

Code:

a = malloc(sizeof(int)*10);

now I see that is totally possible to do:

Code:

int n=10;
int a[n];

My question is: whats the difference -if any- between these two ways? Are both allocating memory in the same place?

Thanks in advance

Thank you so much laserlight!

That was really clarifying


Cheers