Solved

How to create a user defined varible length array in ANSI C++?

Posted on 2006-06-28
3
368 Views
Last Modified: 2010-04-01
So,  this should be a real easy answer for a programming guru... worth 500 points.

How do you code a user defined varible length array in C++?

Please provide me with a code example...

(I'm not a programmer.)

Feel free to ask questions if I'm being unclear!

Thanks all!

Gerhard
0
Comment
Question by:gerhardub
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 14

Accepted Solution

by:
wayside earned 500 total points
ID: 17002128
1)

int length = 25; // get length from user somehow
int *pArray = new int[length];
for (int i=0; i<length; i++) {
   pArray[i] = i; // do something here
}

2) use the STL vector class, it handles all the size issues.

0
 
LVL 14

Expert Comment

by:wayside
ID: 17002524
Don't forget to

delete [] pArray;

when you are done with it or you create a memory leak.
0
 
LVL 30

Expert Comment

by:Axter
ID: 17002700
Hi gerhardub,
FYI:
If you create the array with an empty bracket (), the array gets initialized to zero.
Example:
int *pArray = new int[length]();


David Maisonave (Axter)
Cheers!
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
  Included as part of the C++ Standard Template Library (STL) is a collection of generic containers. Each of these containers serves a different purpose and has different pros and cons. It is often difficult to decide which container to use and …
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question