An unsigned variable is a variable that can only represent non-negative numbers.
An unsigned variable is a variable that can only represent non-negative numbers, as opposed to a signed variable which can represent both positive and negative numbers.
Questions tagged [unsigned]
1251 questions
58
votes
6 answers
When should I just use "int" versus more sign-specific or size-specific types?
I have a little VM for a programming language implemented in C. It supports being compiled under both 32-bit and 64-bit architectures as well as both C and C++.
I'm trying to make it compile cleanly with as many warnings enabled as possible. When I…
munificent
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53
votes
11 answers
Why is int rather than unsigned int used for C and C++ for loops?
This is a rather silly question but why is int commonly used instead of unsigned int when defining a for loop for an array in C or C++?
for(int i;i
Elpezmuerto
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52
votes
7 answers
Unsigned Integer in Javascript
I'm working on a page that processes IP address information, but it's choking on the fact that integers are signed. I am using bitwise operators to speed it up, but the 64th bit (signed/unsigned flag) is messing it up.
Is there any way to force a…
bradlis7
- 3,375
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49
votes
1 answer
convert unsigned char* to std::string
I am little poor in typecasting. I have a string in xmlChar* (which is unsigned char*), I want to convert this unsigned char to a std::string type.
xmlChar* name = "Some data";
I tried my best to typecast , but I couldn't find a way to convert it.
Cyril
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47
votes
5 answers
Difference between unsigned and unsigned int in C
Could you please make it clear what the difference is between unsigned and unsigned int? Maybe some example code would be helpful.
thetna
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44
votes
1 answer
Difference between unsigned and unsigned int in C++
What is the difference between unsigned and unsigned int?
This question was already answered for C (there is no difference):
Difference between unsigned and unsigned int in C
I am interested in knowing whether there is any practical difference in…
paperjam
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43
votes
4 answers
Does C# have an Unsigned Double?
I need to use an unsigned double but it turns out C# does not provide such a type.
Does anyone know why?
Amit Raz
- 5,370
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43
votes
6 answers
Why is a negative int greater than unsigned int?
int main(void)
{
unsigned int y = 10;
int x = – 4;
if (x > y)
Printf("x is greater");
else
Printf("y is greater");
getch();
return (0);
}
Output: x is greater
I thought the output would be y…
Slashr
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41
votes
6 answers
C/C++ use of int or unsigned int
In a lot of code examples, source code, libraries etc. I see the use of int when as far as I can see, an unsigned int would make much more sense.
One place I see this a lot is in for loops. See below example:
for(int i = 0; i < length; i++)
{
//…
brettwhiteman
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40
votes
3 answers
unsigned int (c++) vs uint (c#)
Following is the c# code:
static void Main(string[] args)
{
uint y = 12;
int x = -2;
if (x > y)
Console.WriteLine("x is greater");
else
Console.WriteLine("y is greater");
}
and this…
Samir Lakhani
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- 14
40
votes
5 answers
Why does "int[] is uint[] == true" in C#
Can somebody clarify the C# is keyword please. In particular these 2 questions:
Q1) line 5; Why does this return true?
Q2) line 7; Why no cast exception?
public void Test()
{
object intArray = new int[] { -100, -200 };
if…
Peervm
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- 11
40
votes
2 answers
Why is the sign different after subtracting unsigned and signed?
unsigned int t = 10;
int d = 16;
float c = t - d;
int e = t - d;
Why is the value of c positive but e negative?
Eugene Kolombet
- 331
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- 5
39
votes
4 answers
c++ uint , unsigned int , int
Hi I have a program that deals alot with vectors and indexes of the elements of these vectors, and I was wondering:
is there a difference between uint and unsigned int
which is better to use one of the above types or just use int as I read some…
Ismail Marmoush
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38
votes
5 answers
In C, why is "signed int" faster than "unsigned int"?
In C, why is signed int faster than unsigned int? True, I know that this has been asked and answered multiple times on this website (links below). However, most people said that there is no difference. I have written code and accidentally found a…
Devyn Collier Johnson
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37
votes
8 answers
How do you determine the length of an unsigned char*?
How do you determine the length of an unsigned char*?
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