What is masking in C language?
Masking is the act of applying a mask to a value. This is accomplished by doing: Bitwise ANDing in order to extract a subset of the bits in the value. Bitwise ORing in order to set a subset of the bits in the value. Bitwise XORing in order to toggle a subset of the bits in the value.
How do masks work in C?
Masks. Bit strings and bitwise operators are often used to make masks . A mask is a bit string that “fits over” another bit string and produces a desired result, such as singling out particular bits from the second bit string, when the two bit strings are operated upon.
How do you make a bit mask in C++?
Bit Masking Explained with C++ samples
- To set n th bit ON. Bitwise OR (|) can be used for this purpose.
- To turn OFF nth bit. Bitwise AND (&) can be used for this purpose.
- To Toggle nth bit. number ^= 1 << n;
- To check whether nth bit is ON or OFF. bit = (number >> (n-1)) & 1;
- BitMasking.h. #include.
- BitMasking.cpp. // BitMasking.
- Sample. #include “stdafx.h”
What is bit masking with example?
For example, the mask 10000101 means that the subset of the set [1… 8] consists of elements 1, 3 and 8. We know that for a set of N elements there are total 2N subsets thus 2N masks are possible, one representing each subset. Each mask is, in fact, an integer number written in binary notation.