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Questions tagged [ones-complement]

The ones' complement of a numerical value is evaluated by performing a bitwise NOT operation on its binary representation.

The ones' complement of a numerical value is evaluated by performing a NOT operation on its binary representation.

Read also the wikipedia article on Ones' Complement.

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Why didn't the complement's formula work?

I have just learnt that to get the formula to find the 1st Complement is -x = 2^n - x - 1 I have managed to apply it on a binary case: -00001100 (base 2) = 2^8 - 12 - 1 = 243 = 11110011…
toffee.beanns
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1's & 2's Complement Operation

Need help on verifying my answer. I was given a question which requires me to calculate output for following operations. 25; S&M=00011001 1's Complement=11100110 2's Complement=11100111 -37; S&M=10100110 1's Complement=11011001 2's…
Beta Tracks
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How does computer distinguish 6 (110) and -1 (110) in 1's complement

I was learning about one's complement and how one's complement uses the most significant digit as a sign indicator. If you represent binary number 110 with 1's complement, you get -1. But, obviously, 110 is equivalent to 6 in decimal. Here I was…
chanpkr
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What is wrong with my Ones Complement?

i want to do the following subtraction using ones complement Octal(24)-Hex(4B) and give a binary answer Octal(24) is 20 decimal and Hex(4B) is 75 in decimal 20->10100 75->1001011 taking 1s complement of 75 0110100 and adding to…
Pranav Ghate
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C# convert one's complement bits to a two's complement long?

In C#, how can I convert a 64 bit ones complement number (represented as a long or ulong) to a signed two's complement long? For reference, I'm trying to implement ULP-based double comparison using BitConverter.DoubleToInt64Bits().
ChaseMedallion
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How do you determine one's complement and two's complement in Python?

Here's what I have so far: decimalEquivalent is variable that represents an integer. #One's complement of the binary string is shown onesComplement = bin(~decimalEquivalent) print(f'The negative no (-{decimalEquivalent}) using 1\'s Complement:…
Carissa
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How to subtract negative numbers from negative numbers using Complement notation?

I've just started learning. I am trying to understand this thoroughly and deeply. I somewhat understand it as long as it's subtraction between a Smaller number from a Larger number or a Larger number from a Smaller number, but when the Minuend in…
newbie1kenobi
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Why the status flags in AVR are on after one's-complementing a zeroed register?

I have a code in assembly and I have to find out why the status flags are on One of the codes is LDI R16, 0 COM R16 the result was 0xFF But I don’t understand why the S and C flags were on.
m A
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Value assigned to 0xFFFFFFFF in One's Complement and Two's Complement

This is a short question and I just wanted to clarify something. What is the value assigned to 0xFFFFFFFF in One and Two's Complement? I thought that 0xFFFFFFFF is Two's Complement was -1. However when I used an online Two's Complement calculator, I…
scy17
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Why does 0xff equal to negative 0 in C++

I saw some code looking like this: Object *area = new Object[n]; memset(area, 0xff, sizeof(Object) * count); So this fills the Object array's every field with bit 1. Then later there are multiple places checking if an object's field has not been…
Superziyi
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Is this code correct for 2's complement?

Homework time again. I have to create a program to print 1s and 2s complement of a binary number. So far is tis correct for 2s compliment? Should I allow input, then calculate 1's compliment before 2's? import java.util.Scanner; public class…
user2913004
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1s complement representation for integer variable in C

I am new to C so I got confused with this code. I wanted to know how one's complement will work for integer variable Code: int f = 45; printf("Value of %d is = %d",f,~f); now output is coming as "Value of 45 is = -46" My question is: this is…
user3737377
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Why are the bits inverted in one's complement?

When storing a negative number with one's complement before you add the 1 for two's complement, why are all the bits other than the sign inverted? I suppose It would just be simpler if the only thing different was the sign. The only reason I can…
Greener
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uint(0) - uint(1) output maxValue of uint64

Can anybody tell me why the output is not -1 but 18446744073709551615? package main import ( "fmt" ) func main() { a := uint(0) b := uint(1) fmt.Println(a - b) } output 18446744073709551615 currently, my understanding is the…
syoui jyo
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Signed magnitude and complement

I need to know how to solve this problem please Represent the following decimal numbers in binary using 8-bit signed magnitude, one’s complement, and two’s complement: 88 -76 My solution is : 88 = 01011000 8 bit sm 10100111 1s…
Ali
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