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by: Imbaud Pierre |
last post by:
integer division and modulo gives different results in c and python,
when negative numbers
are involved. take gdb as a widely available c interpreter
print -2 /3
0 for c, -1 for python.
more amazing, modulos of negative number give negative values! (in c).
from an algebraic point of view, python seems right, but I thought
python conformity...
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by: robert |
last post by:
before i go flapping my gums and get deeper in alligators, wondering
whether the following makes sense.
i have a database which provides picklists for input. it started out with a
2 column key in the cross-reference table to the values table, call
them company and state. it's a transitive closure. along the way,
naturally, more columns...
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by: silentlights |
last post by:
Hi,
Is there a possibiliy to improve division or Modulo operations in the
following,
tmp1 = 123;
tmp2 = 123;
frame = ((char)((tmp1/100)+48)); // Division
tmp1 = (tmp2 % 100); // Mod
frame = ((char)((tmp1/10)+48));
tmp1 = (tmp2 % 10);
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by: fordge |
last post by:
we usually use <<n as a cheaper option to multiplication when its
factor of
2^n right,
even for non 2^n say
ix24 ==> ix(16+8) ==> (i<<4)+(i<<3)
similarly divison 2^n is >>n
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by: nessuno |
last post by:
I can't find any discussion of this question in this NG.
I'd like to implement some variable precision integer arithmetic in C,
and do it efficiently. A problem arises with the divide/remainder
operations. I'm using gcc on x86, but a lot of what I say applies to
other architectures.
First, I assume the div and ldiv functions are more...
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by: seb.haase |
last post by:
Hi,
Is it true that that "Python 3000" is dead ?
Honestly I think that e.g. changing 5/2 to be 2.5 (instead of 2) would
just break to much code :-(
On the otherhand I'm using Python as "Matlab replacement" and would
generally like 5/2 ==2.5
So, I was contemplating to default all my modules/scripts to start with
"from __future__ import...
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by: Sri |
last post by:
Hi,
Is there anyway I can implement division in C without using the '/'
operator? Can I use bit aritmetic or such?
Thanks,
Sri
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by: kermit |
last post by:
For a long time,, There has been a discussion of trueFor division
versus integer division in Python.
I myslef prefer that / be used for integer division since almost
always, I want the result of the
division be truncated to integer.
However, today I reviewed the method to be used in Python to get true
division, and this gave
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by: jamesonang |
last post by:
Supposed unsigned int(32 bits) is the largest number that computer can
represent with a single variable.
Now, i have a big integer ( less than 64 bit, but great than 32 bit) .
i represent it by this way:
unsigned int dividend :
divident store low 32 bits of big integer, dividend store high 32
bits of big integer.
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by: jackie |
last post by:
I know in c that 3/2 gets 1 and 3%2 is also 1,and i think this is
guaranteed by C99(is that true?),but on the other hand,-3/2 may be -1
or -2,and -3%2 may be -1 and 1 respectively,it is implement-
dependent,so,is my understanding of this true(positive division and
mod is guaranteed while negative is not)? thx for your help in
advance..
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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...
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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. ...
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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...
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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...
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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...
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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...
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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...
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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: 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...
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