complement

K & R Question: Need help understanding "getbits()" method in Chapter 2

As I've mentioned before, I'm going through K&R, and overall am doing all right with it. However, in chapter 2, the section on bitwise operators (section 2.9), I'm having trouble understanding how one of the sample methods works -- and as a result, I'm having trouble with the associated exercises. (This isn't a dupe of my prior questio...

How does the bitwise complement (~) operator work?

Why is it that ~2 is -3? ...

Is two's complement notation of a positive number the same number?

Is two's complement notation of a positive number is same as its binary representation? ...

why C, C++, Java does not use one complement?

I heard C, C++, Java uses two complements for binary representation. Why not use 1 complement? Is there any advantage to use 2 complement over 1 complement? ...

C++: compute a number's complement and its number of possible mismatches

I got a bit stuck with my algorithm and I need some help to solve my problem. I think an example would explain better my problem. Assuming: d = 4 (maximum number of allowed bits in a number, 2^4-1=15). m_max = 1 (maximum number of allowed bits mismatches). kappa = (maximum number of elements to find for a given d and m, where m ...

Finding complement date ranges?

I have two tables both of which have columns StartDate and EndDate. I'm trying to return a single resultset that contains all date ranges from one table (TableA), and all complement date ranges from the other one (TableB). CREATE TABLE [dbo].[TableA]( [ID] [int] NOT NULL, [StartDate] [datetime] NOT NULL, [EndDate] [datetime...

How to draw complement of a network graph?

Any function in that Graphviz which can do that? If not, any other free software that can do that? ...

Quickest way to find the complement of two collections in C#

I have two collections of type ICollection; c1 and c2. I'd like to find the set of items that are in c2 that are not in c1 where the heuristic for equality is the Id property on MyType. What is the quickest way to perform this in C#. Edit: C# version = 3.0 ...

Negate Unsigned Number in Bash

I have a number (hex) and I want the one's complement of it. For example if X = 20 I want bash to perform a negation and return Y = ~X = DF. It doesn't have to be in bash, but it should use a common command line tool that I can wrap into a script. Also note that the numbers should all be unsigned and I'd prefer they don't overflow the...

How can I invert bits of an unsigned byte in Java?

Hello, I am trying to write a decoder for a very simple type of encryption. Numbers from 0-255 are entered via Scanner, the bits are inverted, and then converted to a character and printed. For example, the number 178 should convert to the letter "M". 178 is 10110010. Inverting all of the bits should give 01001101, which is 77 or ...

idiomatic way to construct the complement of an array in C

I'm writing a function that gets passed a pointer to an array of length 4. This array will contain integers 0 <= x <= 52 and I would like to construct an array of length 48 with every integer from da kine that's not in the passed in array. In python this would be # just included for specificity cards = [card for card in deck if card not...

Fuzzy Logic . How to get the complement

Hi, i came across the following fuzzy logic example about fuzzy logic. Representing Age Problem 2-1. Fuzzy sets can be used to represent fuzzy concepts. Let U be a reasonable age interval of human beings. U = {0, 1, 2, 3, ... , 100} Solution 2-1. This interval can be interpreted with fuzzy sets by setting the universal space for age ...