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]
162 questions
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Why are signed negative numbers converted to unsigned numbers?
Particularly i have a large unsigned number and a large signed negative number.
Why can't I divide a large number by a negative number C++
When I try to divide the two, I get the result zero simply because something somewhere is converting my signed…
user3315127
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C++ unsigned long and <
I have the following code:
while( int()(uStartFrame - iFrameOffset) < 1)
{
iFrameOffset--;
}
uStartFrame and iFrameOffset are both unsigned long, so the < statement is a little difficult, I think.
However, I thought that I fixed it using…
tmighty
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How to use stoull on VS2008?
Do you have any idea on how to use stoull on Visual Studio 2008? I want to convert string to unsigned long long. Thanks!
Christian Mark Ramos Godoy
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Get the network 5bytes warning left shift count >= width of type
My machine is 64 bit. My code as below:
unsigned long long periodpackcount=*(mBuffer+offset)<<32|*(mBuffer+offset+1)<<24|* (mBuffer+offset+2)<<16|*(mBuffer+offset+3)<<8|*(mBuffer+offset+4);
mBuffer is unsigned char*. I want to get 5 bytes data…
Ericzhang88120
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unsigned long long to binary
I am trying to check the set bits of an unsigned long long in c++ using below algorithm which only checks whether the bit is set or not.But my problem is the answer that I get is wrong.Please help me understand how unsigned long long is stored in…
g4ur4v
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3 answers
Unsigned long returning negative in C++
below when any of the numA-D is multiplied numerous times the number suddenly becomes a negative. For example when numA is multiplied 3 times by 256 the number then becomes negative,but not if only multiplied by 256 twice. The purpose of this…
user1739860
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C++ Largest Numerical Storage
Is there an equivalent to Java's Bigint in C++ that can store the following…
Richard
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Division of a long long C type
I need to use the 'long long' c type, to store data in a very large array. Since my code is large, I made up this fairly simple code which has the same problem. So, it iterates 222 times in the loop, and prints out when the loop reaches 50% (of…
Anoracx
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Will a 64-bit Unsigned Integer wrap around on 32-bit system?
Simple question, need an answer quickly please!
Take this situation on a 32-bit machine:
Unsigned long long n = 1;
n -= 2;
I know on a 64-bit machine, this would wrap around to the highest unsigned long long. But what would happen on a 32-bit…
Jason Block
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Unsigned long long arithmetic into double
I'm making a function that takes in 3 unsigned long longs, and applies the law of cosines to find out if the triangle is obtuse, acute or a right triangle. Should I just cast the variables to doubles before I use them?
void triar( unsigned long…
Painguy
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Dynamic Programming Issue - Fibonacci Sequence
I was reading this Wikipedia article, and attempting to implement a 'map' based solution in C, where a 'map' is just an int array, initialized to 0.
For some reason it works up to fib(93), then starts outputting strange numbers. If it matter's I'm…
Josh
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How to convert unsigned long long to float/int in C?
An unsigned long long variable has the value of "40 36 70 A3 D7 0A 3D 71" in hex. If I print it with the %fconversion specifier I get the right conversion from IEEE-754. How can I cast this variable to a floating one or int, even if I lose some…
Stoica Remus
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Massive performance slowdown when changing int to unsigned long long in segmented sieve
I'm confused about the performance of my C program that implements a Segmented Sieve. I originally used only int as the datatype but to support bigger numbers I decided to switch to unsigned long long. I expected some performance penalty due to…
Chase
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Maximum Value for Unsigned Int is it -1
I was trying to figure out the minimum and maximum value for an unsigned data type. I know that the minimum unsigned value is 0 and the maximum value is (2^n)-1. However, when I tried to run my program (I cannot post my code, but you can refer to…
eLg
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The mod function isn't working properly for me
When I input 36011 it results in the second(s) output being 36011 instead of 11, I made sure the compiler settings were set correctly and everything. I genuinely don't know what else to do, I have to use long long int for this assignment and it's…
Ethan
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