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by: Kapil Khosla |
last post by:
Hi,
I have been trying to understand this concept for quite sometime now
somehow I am missing some vital point. I am new to Object Oriented
Programming so maybe thats the reason.
I want to understand what is typecasting in C++. Say I have a Base
class and a Derived class, I have a pointer to an object to each.
Base *ba = new Base;
Derived *de = new Derived;
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by: Nicolay Korslund |
last post by:
Hi! I'm having a little trouble with the typecast operator, can anybody
help me with the rules for when the this operator is invoked?
In the class 'Test' in the code below, the typecast operator returns a
'mytype'. In main() I use the operator on 'Test'-class objects. If
'mytype' is a pointer the operator works fine. But if I instead try
to call an overloaded operator, the typecast operator is not invoked,
and I get a compiler error...
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by: Arun Prasath |
last post by:
Hi all,
I have the following question regd pointer typecasting. Is the
following type of pointer typecasting valid?
#define ALLOC(type,num) ((type *)malloc(sizeof(type)*num))
/*begin code*/
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by: andynaik |
last post by:
Hi,
Whenever we type in this code
int main()
{
printf("%f",10);
}
we get an error. We can remove that by using #pragma directive t
direct that to the 8087. Even after that the output is 0.00000 and no
10.0000. Can anybody tell me why it is like that and why typecasting i
not done in this case?
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by: Vinod Patel |
last post by:
I have a piece of code : -
void *data;
......
/* data initialized */
......
struct known_struct *var = (struct known_struct*) data; /*typecasting*/
How is this different from simple assignment.
int b = some_value;
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by: jdm |
last post by:
In the sample code for the SortedList class, I see the use of a string
typecasting macro consisting of a single letter "S". i.e.:
Sortedlist->Add(S"Keyval one", S"Item one");
Now I have deduced that the "S" can be replaced with (String __gc *) and the
code will compile and run just fine. But what I can't find is what exactly
Microsoft calls these macros (I have also seen "L" used the same way) and
where they are all documented. I...
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by: Mark Fink |
last post by:
I try to port a server application to Jython. At the moment I use
Jython21\Lib\socket.py
Currently I do face problems with casting the string "localhost" to the
desired value:
D:\AUT_TEST\workspace\JyFIT>jython fit/JyFitServer2.py localhost 1234
23
localhost
Traceback (innermost last):
File "fit/JyFitServer2.py", line 146, in ?
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by: bwaichu |
last post by:
What is the best way to handle this warning:
warning: cast from pointer to integer of different size
I am casting in and out of a function that requires a pointer type. I
am casting an integer as a pointer, but the pointer is 8 bytes while
the integer is only 4 bytes.
Here's an example function:
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by: bwaichu |
last post by:
I am starting this thread after having run into two separate
programming problems,
where the compiler offered no help. The compiler did not even warn.
The programs
compiled fine. And the programs even appeared to work.
The first case was passing directly a variable of type char **.
Here's an example:
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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, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
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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: 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, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
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...
|
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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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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