Thread: Variable length arrays

If I remember right C90 doesn't support variable length arrays, while C99 does support them(see Status of C99 features in GCC - GNU Project - Free Software Foundation (FSF))

so, is it ok to use variable length arrays when using C99 dialect?

my professor says that the compiler will show error if I say for example

Code:

int n=10;
int x[n];

but that's not correct, some compilers show error some don't, but this really does have to do with the dialect right?

also he taught us about one line comments, after a little research i found that in c90 they are forbidden, while in C99 they are allowed(see again Status of C99 features in GCC - GNU Project - Free Software Foundation (FSF)). So that does mean that we're learning c99. So is he right when he tells us that a variable length array would result in an error?

Right, your professor is not using the current C standard. Tell him that the dark ages are over, and then do him a favor and give him a copy of the latest GCC snapshot.