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by: maniac |
last post by:
Hey guys, I'm new here, just a simple question.
I'm learning to Program in C, and I was recommended a book called,
"Mastering C Pointers", just asking if any of you have read it,
and if it's worth the $25USD.
I'm just looking for a book on Pointers, because from what I've
read it's one of the toughest topics to understand.
thanks in advanced.
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by: Ken Turkowski |
last post by:
The construct
(void*)(((long)ptr + 3) & ~3)
worked well until now to enforce alignment of the pointer to long
boundaries. However, now VC++ warns about it, undoubtedly to help things
work on 64 bit machines, i.e. with 64 bit pointers.
In the early days of C, where there were problems with the size of int
being 16 or 32 bits, the response was that an int was guaranteed to hold
a pointer (yes, there were 64Kb address spaces at one time!)....
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by: ozbear |
last post by:
This is probably an obvious question.
I know that pointer comparisons are only defined if the two pointers
point somewhere "into" the storage allocated to the same object, or if
they are NULL, or one-past the end of the object as long as it isn't
dereferenced.
I use "object" in the standard 'C' sense.
Is there some special dispensation given to comparing two pointers
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by: sunglo |
last post by:
Some time a go, in a discussion here in comp.lang.c, I learnt that it's
better not to use a (sometype **) where a (void **) is expected (using
a cast). Part of the discussion boiled down to the rule: if I cast a
(sometype **) to a (void **) I am making a number of assumptions about
the implementation's (void **) representation and length. Specifically,
if I do the above cast I'm assuming that a (sometype **) and a (void
**) have the same...
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by: ballpointpenthief |
last post by:
I am trying to build a generic type for data structures in order to be
able to build complex data structures based on other, simpler data
structures.
So, say we have linked lists, doubly linked lists, and hash tables as
some of our elements, we could build up combinations of these and
encapsulate them, and then combine these new types to form a new type
which could be extended further.
***One way might be to hold a structure-type...
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by: ivan.leben |
last post by:
I want to write a Mesh class using half-edges. This class uses three
other classes: Vertex, HalfEdge and Face. These classes should be
linked properly in the process of building up the mesh by calling Mesh
class functions. Let's say they point to each other like this:
class Vertex {
HalfEdge *edge;
};
class HalfEdge {
Vertex* vert;
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by: ziroi |
last post by:
Hello!
I am new here to the forums and still learning C. I understand your policies on coursework, but I have an error that I've run around and around and can't figure out where my problem is with my assignment. I hope you guys can point me in the right direction.
I have a program which has an array of linked lists, with specific struct data elements inside each node of these lists. The linked lists are created dynamically and data...
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by: J Caesar |
last post by:
In C you can compare two pointers, p<q, as long as they come from the
same array or the same malloc()ated block. Otherwise you can't.
What I'd like to do is write a function
int comparable(void *p, void *q)
that will take any two pointers and decide whether they can be compared
or not.
I really can't think how to do this - any suggestions?
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by: smp |
last post by:
Does anyone know why making a vector of pointers is so much less efficient
than a vector of objects? For a simple example:
int num = 20;
vector<int*v_int_ptr;
v_int_ptr.reserve(num);
for(int i = 0; i < num; i++)
{
int* my_int_ptr = new int;
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by: Keith Thompson |
last post by:
Victor <vhnguyenn@yahoo.comwrites:
You're declaring an array of pointers to unsigned long long, but
you're initializing the pointers with integer values. This is
actually a constraint violation, and your compiler should have warned
you about it. Your problem is either that you're invoking your
compiler in some non-standard mode that inhibits the warnings, or
getting warnings and not bothering to tell us about them.
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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, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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 protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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