A question about arrays.

[Bilal Sallakh]

In this function:

int f() {
int A[];
// TODO...
}

What is the use of A? How to assign memory to A? and how to use it later?

 

[Rolf Magnus]

In this function:

int f() {
int A[];
// TODO...
}

What is the use of A?
None.

How to assign memory to A?
Not.

and how to use it later?

You can't. The above should produce a compile error. You're trying to
create an array that has no size.

 

[Mike Wahler]

In this function:

int f() {
int A[];
// TODO...
}

What is the use of A?

Invokes translator diagnostic.

How to assign memory to A?

int A[some_constant_expression];

or

int *A = new A[some_size];

and how to use it later?

Use it for what?

Which C++ book(s) are you reading?

-Mike

 

[Bilal Sallakh]

In turbo C++ from Borland Version 1 1990, a .c file raised a compile
time error while a .cpp file didn't. Is this up to the Compiler used?

 

[Rolf Magnus]

If you have a question that is not related to a thread, please don't
post it as reply to it.

In turbo C++ from Borland Version 1 1990, a .c file raised a compile
time error while a .cpp file didn't. Is this up to the Compiler used?

Yes.