Comments on: 6.12 — References vs. pointers, and member selection

By: Vishal Singhal

Vishal Singhal — Mon, 29 Nov 2010 16:39:07 +0000

What cannot be done using references in C++. Can we have array of references just like array of pointers?

By: dribbit

dribbit — Sat, 20 Feb 2010 05:06:58 +0000

those are assignment statements that would change the value to 6 using either one.

By: Pierre

Pierre — Wed, 03 Feb 2010 23:39:23 +0000

I don’t understand how

1.*pnValue = 6;
2.rnValue = 6;

if nValue started out as 5.

By: jb

jb — Thu, 21 Jan 2010 19:10:30 +0000

How does one go about changing the size of an existing array? I guess you could just use c realloc, but surely there’s a better way

By: Alex

Alex — Sat, 02 May 2009 04:40:08 +0000

returnLocal() will return 9, which will be assigned to a. Then the program will exit.

I am not sure what you are asking.

By: LOLY

LOLY — Mon, 06 Apr 2009 16:20:38 +0000

just question :

is the code true ?

int returnLocal(){ int x=8 ; return ++x; }

int main() { int a=returnLocal() ; return 0;}

By: Alex

Alex — Fri, 06 Feb 2009 08:26:50 +0000

Thanks for visiting!

By: almalki

almalki — Sun, 01 Feb 2009 20:33:34 +0000

thank you alex for evry think about this point .

I hope to be your friend.

sorry, i can not write english 100% , becouse i have mistakes.

thanks for all friends

By: Alex

Alex — Thu, 11 Dec 2008 07:34:36 +0000

Yes, it is possible, just much more difficult than using vectors.

When you say “dynamically size an array”, do you want to dynamically allocate an array to a particular size, or dynamically resize an existing array? Either thing is possible, but the latter is much more difficult.

Also, if you’re passing a non-const reference to an array to a function, that means the function is going to modify the array. There’s no need to return a reference back to the caller because the caller can access the array through it’s original name.

By: John Durant

John Durant — Wed, 10 Dec 2008 21:12:38 +0000

Here is what I am trying to do:

Dynamically size an array
Pass a reference to that array to a function
Modify the size and or contents of the array
Return the reference to the modified array

I know this is possible using vectors, is it possible to do with arrays?

Thanks,
John