unsigned long long int specified in the C99 standard
unsigned long long long int is at least 64-bit in size and was specified in the C99 standard. It is the same as long long but unsigned.
Questions tagged [unsigned-long-long-int]
151 questions
111
votes
10 answers
Java equivalent of unsigned long long?
In C++, I enjoyed having access to a 64 bit unsigned integer, via unsigned long long int, or via uint64_t. Now, in Java longs are 64 bits, I know. However, they are signed.
Is there an unsigned long (long) available as a Java primitive? How do I use…
eleven81
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1 answer
Can the Django ORM store an unsigned 64-bit integer (aka ulong64 or uint64) in a reliably backend-agnostic manner?
All the docs I've seen imply that you might be able to do that, but there isn't anything official w/r/t ulong64/uint64 fields. There are a few off-the-shelf options that look quite promising in this arena:
BigIntegerField ... almost, but…
fish2000
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4 answers
Using long int in PHP
I am trying this out, but am unable to store large value
$var = rand(100000000000000,999999999999999);
echo $var; // prints a 9 digit value(largest possible)
How to get a desired value ?
Prashant Singh
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16
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3 answers
(lldb) Print unsigned long long in hex
I am trying to debug my Objective-C program, and I need to print my unsigned long long variable in hex. I am using the lldb debugger.
In order to print short as hex, you can use this:
(lldb) type format add --format hex short
(lldb) print…
Mazyod
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14
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3 answers
Unsigned Long Long from Double in Swift
I used to use the following in Objective-C:
double currentTime = CFAbsoluteTimeGetCurrent();
// self.startTime is called before, like
// self.startTime = CFAbsoluteTimeGetCurrent();
double elapsedTime = currentTime - self.startTime;
//…
GarethPrice
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12
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3 answers
unsigned long long vs unsigned long(portability point of view)
I want to be able to use large positive integers(8 bytes) in my project, even though sizeof(unsigned long) yields 8 in my system, I read that in most systems unsigned long is only 4 bytes and I decided to give unsigned long long a go, since it's…
erin c
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11
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4 answers
Printing unsigned long long int Value Type Returns Strange Results
I have a problem while using the printf function to print values of type unsigned long long int
I have no idea what's wrong. I'm using Dev-Cpp 4.9.9.2 and Visual Studio 2010 Professional (I know that it's not C compiler, but anyway, wanted to try)…
browning0
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10
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Implicit conversion: is the following warning valid?
This question Implicit type conversion rules in C++ operators (and several others) state
If either is long long unsigned int the other is promoted to long long
unsigned int
However if I do the following under MSVC:
unsigned int a =
dgnuff
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1 answer
Why is the std::bitset constructor with an unsigned long long argument not marked as explicit?
The Standard Library class template std::bitset has a constructor (C++11 and onwards, unsigned long argument before C++11)
constexpr bitset(unsigned long long) noexcept
Contrary to many best-practice guidelines, this single-argument constructor…
TemplateRex
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8
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6 answers
Getting big random numbers in C/C++
Standard rand() function gives numbers not big enough for me: I need unsigned long long ones. How do we get really big random numbers? I tried modifying a simple hash function but it's too big, takes too long to run and never produces numbers which…
ForceBru
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8
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2 answers
Is std::streampos guaranteed to be unsigned long long?
Is std::streampos guaranteed to be unsigned long long?
If not so, how does std::istream::seekg work correctly on files larger than 4G?
xmllmx
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8
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4 answers
Bizarre floating-point behavior with vs. without extra variables, why?
When I run the following code in VC++ 2013 (32-bit, no optimizations):
#include
#include
#include
double mulpow10(double const value, int const pow10)
{
static double const table[] =
{
1E+000, 1E+001,…
user541686
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8
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Why aligning of long long union member is bigger than the containing union/struct? Is this correct?
From this question one could start to believe that alignment of a union is not less than the largest alignment of it's individual members. But I have a problem with the long long type in gcc/g++. The full example can be found here, but here are the…
PiotrNycz
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6 answers
How can you easily calculate the square root of an unsigned long long in C?
I was looking at another question (here) where someone was looking for a way to get the square root of a 64 bit integer in x86 assembly.
This turns out to be very simple. The solution is to convert to a floating point number, calculate the sqrt and…
Philip Couling
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Store unsigned long long using Core Data
Variations of this question have been asked here and here, but it appears that the question hasn't received a clear answer.
The problem that I face is that the MPMediaLibrary framework keeps a reference to each MPMediaItem (music, video, podcast,…
Bart Jacobs
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