0
The easiest way to do this is with an exclusive-or operator, represented by the ^ symbol.
For example, 10 ^ 15 = 1010b ^ 1111b = 0101b
Here's a quick example script that would make use of it:
#!/usr/bin/php
<?php
if($argc != 2){ echo "gimme a number!\n"; exit;}
$x = $argv[1];
for($n = 0; 1 << $n <= $x; $n++);
$y = $x ^ ((1 << $n) - 1);
echo "The binary complement of $x = %y\n";
What else can I help you with?
What is the tilde used for in computer programming and how does it affect the functionality of code?
In computer programming, the tilde () is often used as a bitwise NOT operator. It flips the bits of a binary number, changing 0s to 1s and 1s to 0s. This can affect the functionality of code by performing bitwise operations on data, such as inverting the bits of a number or toggling specific bits in a binary representation.
What is bitwise product?
The bitwise product, often referred to as the bitwise AND operation, is a binary operation that takes two binary numbers and compares their bits. For each pair of corresponding bits, the result is 1 if both bits are 1, and 0 otherwise. For example, the bitwise product of the binary numbers 1101 (13 in decimal) and 1011 (11 in decimal) would be 1001 (9 in decimal). This operation is commonly used in computer science for tasks such as masking and setting specific bits.
What are Bit Manipulations in C programming?
in C you can manipulate the individual bits of a data item. << leftwise shift >> rightwise shift & bitwise AND | bitwise OR ~ bitwise complement (flips all bits) I can't go intoa tutorial here in how to use these, but google it - i just did and there's tons of info out there.
What is the definition of bitwise?
Bitwise operations are those that operate on one or more bits of data, as opposed to larger units of data. For example, in C++, there are the bitwise operators "^" (exclusive or), "&" (and), "|" (or), and "~" (bitwise complement). Using these symbols, it is possible to determine if a bit is set or unset, combine sets of bits, find common bits, or invert all the bits at once. This allows the use of a single field (such as an int variable) to hold multiple pieces of data. Algorithms that concern themselves with saving space, such as compression algorithms, embedded system code, and so on, will often use bitfields instead of entire bytes of data whenever practical.
What is the use of complementry operator in c?
The bitwise complement or one's complement operator (~) is used to switch the state of all the bits in a value. Thus 1's become 0, and 0's become 1. One of its many uses is to unset individual bit(s) in a bitmap. We do this with a bitwise AND of the bitmap and the bitwise complement of the bit(s) we want to unset. Original bitmap: 01011100 Bit to unset: 00000100 (e.g., bit 2 (bits are zero based from right)) // Using one's complement and bitwise AND ~00000100 & 01011100 11111011 (one's complement of bit 2) & 01011100 (original bitmap) = 01011000 (original bitmap with bit 2 unset) Note that this formula works even if bit 2 were already unset: 11111011 (one's complement of bit 2) & 01011000 (original bitmap, with bit 2 unset) = 01011000 (original bitmap unchanged)
What is a bit shift?
A bit shift is a bitwise operation in which the bits in a value are shifted left or right.
What is the tilde used for in computer programming?
In computer programming, the tilde () is often used as a bitwise NOT operator to invert the bits of a number. It can also be used in some programming languages to represent home directory paths or to indicate approximation in mathematical operations.
What is the difference between bit wise operator and logic operator?
The logic operator provides boolean results of combinations of other boolean expression, some of which might be relational expressions. For example... bool result = (a < 3) && (b > 4); The bitwise operator provides the same kind of boolean logic, AND, OR, and NOT, but it does it to the correspondingly ranks bits in one or two integers. For example ... int result = (a & 0xff) | (!b);
Which logic instruction would you use to reverse the state of the bits in a word?
To reverse the state of the bits in a word, you would use the bitwise NOT instruction, often represented as ~ in many programming languages or as NOT in assembly language. This instruction flips each bit in the word, turning 0s into 1s and 1s into 0s. In a typical scenario, applying this instruction to a binary word effectively reverses its state.
Why do you need to learn how to AND?
The AND operator is a binary operator, thus it accepts two operands. However, the type of the operands depends upon whether you mean the logical AND or the bitwise AND. The logical AND (&& in C/C++) accepts two boolean expressions, returning true if and only if both expressions evaluate true. If either or both evaluate false, the return is false. int a=42, b=69; assert (a==42 && b==69); // e.g., true AND true == true The bitwise AND (& in C/C++) does the same thing but at the bitwise level, comparing each of the corresponding bits of each operand. If both bits are 1, then the output for that bit is 1, otherwise the output is 0. You do this to determine which specific bits appear in both operands. For this to work, both operands must be of the same type and length (in bits). int a=42, b=69, c=a & b; assert (c==0); In binary: a (00101010) & b (01000101) = c (00000000)
What is the significance of the symbol in programming languages?
In programming languages, the symbol is commonly used to represent bitwise NOT operation, which flips the bits of a binary number. It is significant for performing bitwise operations and manipulating binary data efficiently.
What is rshift?
Rshift, or right shift, is a bitwise operation that shifts the bits of a binary number to the right by a specified number of positions. Each shift to the right effectively divides the number by two, discarding any bits that fall off the end. In programming, it is often represented by the >> operator. This operation is commonly used in tasks like optimizing calculations and manipulating binary data.
