473,396 Members | 1,714 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,396 software developers and data experts.

Return a 2D array using pointers

44
Hello

I need to call a function that returns a 2D array. I need to dynamically allocate memory for the array in the callee. Now, I return using a pointer to a pointer.

In the callee, I allocate the memory using mallloc, assign values to the array elements, output using printf in the callee. Eveything works fine.
But in the caller function, I am unable to access the array elements using the pointer returned. I either get garbage values, or an access violation error or both.

I am attaching the code. Will someone please tell me why it is not working?

Hanaa
Attached Files
File Type: txt arrays.txt (566 Bytes, 584 views)
Oct 18 '09 #1
2 3394
hanaa
44
I am so very sorry.

I forgot to write the return statement in the callee.
Oct 18 '09 #2
Banfa
9,065 Expert Mod 8TB
A semi decent modern compiler should issue a diagnostic about that which begs the questions

Are you using an old compiler or have you not switched on all warnings or did you ignore the warnings?

If it is the final case then never ignore warnings, they are there for a reason and 99% of the time you can make your code compile without warnings.
Oct 18 '09 #3

Sign in to post your reply or Sign up for a free account.

Similar topics

4
by: Isaac | last post by:
Hi mates I want to know a simple program of return array from function ? Do I need to use pointer to return the address of the first element in an array. Isaac
6
by: Neo | last post by:
Dear All, I want to know how a subroutine should return an array of values to the main program. From the main program, I call a sub-routine 'get_sql' which then fetches data from oracle db using...
16
by: priya | last post by:
Hi all, I am new to this group.I am working in c language.I have dount in pointer? how to retun array of pointer in function? example main()
204
by: Alexei A. Frounze | last post by:
Hi all, I have a question regarding the gcc behavior (gcc version 3.3.4). On the following test program it emits a warning: #include <stdio.h> int aInt2 = {0,1,2,4,9,16}; int aInt3 =...
31
by: CeZaR | last post by:
Hi, How can i specify the return type of a function returning a managed array of chars. If i try to write: "char __gc func()" i get an error! How can i do that? Thanks!
45
by: noridotjabi | last post by:
What is the purpose of the function pointer? Why do you need a pointer to a function. I cannot really think of any application where this is the only or even easiest solution to a problem. I'm...
12
by: Aff | last post by:
Brothers , i am facing a problem which is as follow: class poly { private: char name; int capacity; public: poly(char , int );
18
by: Pedro Pinto | last post by:
Hi there once more........ Instead of showing all the code my problem is simple. I've tried to create this function: char temp(char *string){ alterString(string); return string;
5
by: kkirtac | last post by:
Hi, i have a class "myClass", and i want to return two instances of the same class from a function. I define an array as follows : "myClass sample ;" and i initialize two instances: "myClass...
127
by: sanjay.vasudevan | last post by:
Why are the following declarations invalid in C? int f(); int f(); It would be great if anyone could also explain the design decision for such a language restricton. Regards, Sanjay
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.