Solved

dynamically allocating multi-dimensional array using new

Posted on 1998-12-13
3
210 Views
Last Modified: 2010-04-02
Hi!

  Here is the beginner's question: How do I dynamically allocate a multi-dimensional array say int test[row][col] using the C++ 'new' operator? I tried the following:

int** test;
test = new (int*)[row];
for(int i=0;i<row;i++)
  test[i] = new int[col];

but it didn't even compile...
I also tried test = new int[row][col], no lucky either...


Can anybody please help? Also, it will be good if you can show me how to free the array using 'delete'. Thanks a lot and sorry for the point :-Ppp (that's all I have)

wyldsj
0
Comment
Question by:wyldsj
  • 2
3 Comments
 

Author Comment

by:wyldsj
ID: 1180122
Edited text of question
0
 
LVL 2

Accepted Solution

by:
trillo earned 0 total points
ID: 1180123
Supose you have A and B as your dimensions:
To use the new operator use something like this:
int **W;
W = new Complex* [A];
for (int i = 1; i < A; l++)
{
    W[i] = new int [B];
}

To use the delete operator use something like this:
for (int i = 1; i < A; l++)
{
    delete []_W[i];
}
delete []_W;


Trillo
0
 

Author Comment

by:wyldsj
ID: 1180124
thanks for your help, trillo!
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

Unlike C#, C++ doesn't have native support for sealing classes (so they cannot be sub-classed). At the cost of a virtual base class pointer it is possible to implement a pseudo sealing mechanism The trick is to virtually inherit from a base class…
Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
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.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

832 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