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Questions tagged [signed-integer]

71 questions
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Unsigned Multiplication using Signed Multiplier

I have been assigned with a task to perform unsigned multiplication using signed multiplier. Despite multiple attempts, I couldn't get it. Is it possible to do this? Code: #include int main() { // Must be short int short int…
fatalcoder524
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C# Masking a signed int with a hex mask that "looks like" UInt

I have a problem with masking an Int16, C# interprets the mask's high hex number (65532d) as an Int32. I have seen many examples but they have either UInt or use friendly sunshine low-bit masks that don't interfere with the sign bit so no…
P Oltergeist
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Is the two's complement of a negative integer used only for addition and subtraction?

So for example, 13 in binary is: 00000000 00000000 00000000 00001101. Would -13 be stored as 10000000 00000000 00000000 00001101 (using the most significant bit to represent the sign) or would it be stored using the two's complement? (Specifically…
Taseen A
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How to drop '+' or '-' characters in MASM Assembly

In MASM Assembly, if the user writes "-22", I want to check the first character for a "-" sign and then drop it. If the user writes "+12", I want to check the first character for a "+" sign and then drop it. The code below is not working. Could…
halpme
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Java convert from signed to unsigned in a single byte

I have a byte b that in Java represents signed integers from -128 to +127. How do I convert it to represent only (positive) unsigned integers? I don't want to use int or long but a 1-byte representation and simply shift the bits in b
raff5184
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Convert HEX to Signed INT Javascript

I am trying to convert this HEX value fba46c58 to a signed int then take that number and divide it by 1000000. I have tried the following code but I don't seem to come up with the correct number. Overall I need the end number to equal…
gregwinn
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Hashing int16_t to uint64_t

I'm trying to make a hash function for int16_t. The function prototype looks like this: uint64_t hash_int16_t(const void *key); So far I've gotten this but I don't know if this is the correct approach: uint64_t hash_int16_t(const void *key) { …
user8298902
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What are the specifics of STORING a 32 bit signed integer into a register?

My number type is a signed two’s complement integer. In memory registers %rdi/edi/di, I have 0xFFFFFFFF. In %rsi/esi/si, I have 0x80000000. My instruction is addl %edi, %esi. How do I properly add these? I think the answer is: Since I'm adding the…
The_Senate
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What does actually mean by the statement "PHP does not support unsigned integers"?

I am using PHP 7.0.2 At one place in the manual on integers, I saw the below statement : Integers can be specified in decimal (base 10), hexadecimal (base 16), octal (base 8) or binary (base 2) notation, optionally preceded by a sign (- or…
PHPLover
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Reading a fortran generated binary file into a signed integer array in C++

I am learning C++. I want to read some files generated by a fortran program in a C++ program. Each of the files I want to read contains a list of numbers which are either 0, 1, or -1. These numbers are the elements of an array of 1-byte integers…
Harinder Pal
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Convert binary to signed int/decimal

I am trying to convert hex data to signed int/decimal and can't figure out what I'm doing wrong. I need FE to turn into -2. I'm using Convert.ToInt32(fields[10], 16) but am getting 254 instead of -2. Any assistance would be greatly appreciated.
StarScr3am77
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How to convert NSString with negative integer into negative integer

In my app, I want to display 0 if NSString contains negative integers. I tried to convert NSString into signed int but my NSString to signed int conversion code always returns 0 value. Eg: I want to convert @"-0.02" into -0.02 int. But my code…
Kirti Nikam
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Largest positive value of a signed integer type of unknown size

If we have a unsigned integer type which we may not know the size of, for example size_t, then we can get the largest value it can hold relatively simply with something like: size_t maximal = -1; Is there a similar technique for a signed integer…
John Hascall
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Unsigned -1 = signed -1

Quite a few similar questions have been asked, but it still baffles me how unsigned int a = -1; int b = ~0; if (a == b) printf("%u\t%d", a, b); returns 4294967295 -1 I understand how the values are stored in C and why it displays those…
Paulo
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strange behaviour of comparing two signed integers in a for loop

I am trying to solve a problem stated as follows: given a set segments, and a set of points, calculate how many segments contain each point. The problem that I have encounterd is when I have to count how many times a point is contained by a segment.…
Endrit Sino
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