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by: Tim Clacy |
last post by:
How is a 64 bit type defined in strict C++?
It seems C has support for 'long long' since C99, but not so for C++?
Looking through one compiler vendor's standard library headers has clouded
the issue somewhat; it uses __int64 in some places (with a comment about
strict) but freely uses 'long long' in other places. In any case, these
standard library headers are supposed to be 'standard' w.r.t. C and C++
aren't they? How can a standard...
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by: William Payne |
last post by:
Hello, I have a variable of type unsigned long. It has a number of bits set
(with set I mean they equal one). I need to determine those bits and their
position and create new numbers from them. For example, consider this
four-bit number:
1100
from this number I want to extract two numbers:
1000 and 100
had the four-bit number been 0101 I would want to extract 100 and 1.
How should I do this? I wish I had some code to post but I don't...
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by: Mark Shelor |
last post by:
Problem: find a portable way to determine whether a compiler supports
the "long long" type of C99.
I thought I had this one solved with the following code:
#include <limits.h>
#ifdef ULONG_LONG_MAX
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by: Richard A. Huebner |
last post by:
Is the unsigned long long primitive data type supported in ANSI
standard C?
I've tried using it a couple of times in standard C, but to no avail.
I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
with RedHat linux 9.
If not, what data type will yield the largest unsigned integer for me?
Thanks for your help,
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by: luke |
last post by:
Hi everybody,
please, can someone explain me this behaviour.
I have the following piece of code:
long long ll;
unsigned int i = 2;
ll = -1 * i;
printf("%lld\n", ll);
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by: Charles Sullivan |
last post by:
I maintain/enhance some inherited FOSS software in C which has
compiler options for quite a few different Unix-like operating
systems, many of which I've never even heard of.
It would be convenient (and for some things possibly necessary)
to use long long integer and/or unsigned long long integer
variables.
How widely supported are these variable types? How long ago were
they introduced? I notice they are not mentioned in K&R #2.
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by: Ahmad Jalil Qarshi |
last post by:
Hi,
I have an integer value which is very long like 9987967441778573855.
Now I
want to convert it into equivalent Hex value.
The result must be 8A9C63784361021F
I have used sprintf(pHex,"%0X",9987967441778573855). But it only
returns 8
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by: PengYu.UT |
last post by:
Hi,
In python, triple quote (""") can be used to quote a paragraph
(multiple lines). I'm wondering if there is any equivalent in C++.
For the following code, I could write the long string in a single line
with "\n" in the middle, or I could use multiple cout and endl. But I
just feel more readable if I can have the whole paragraph as a string.
Thanks,
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by: ratcharit |
last post by:
Currently using cosine function in math.h
Currently I get:
1 = cos(1e^-7)
Is there another way for cos to return value of high accuracy say:
0.999999 = cos(1e^-7)
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by: Oliver Graeser |
last post by:
I need a >49 bit integer type. tried sizeof(long long), says 8. 8 byte =
64 bit right? but when I try to assign a value with more than 32 bit,
it fails. To illustrate:
for (i=0; i<64; i++){
long long int k = 1<<i;
cout<<i<<"\t"<<k<<"\t"<<sizeof(k)<<"\n";
}
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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: 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:
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: 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: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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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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