What does ~a mean in c++

~a in C represents the bitwise negation operator, which inverts each binary bit of a given number, converting 1 to 0 and 0 to 1, and returning the same type of result. Uses include converting two's complement representations, clearing specified bits, converting opposites, and masking operations.

~a means in C

~a is the bitwise negation operator in C.

Detailed explanation

The bitwise negation operator performs bitwise operations on the given number and negates each binary digit of the number.

In other words, it converts 1 to 0 and 0 to 1.

Usage example

Suppose we have an integer a, its binary representation is:

<code>a = 01100100</code>

After performing the ~a operation, the binary representation becomes:

<code>~a = 10011011</code>

Because each binary bit is inverted.

In C, the result of the ~a operator is an integer whose type is the same as the input integer.

Purpose

The bitwise negation operator is usually used for:

• Convert a number to its complement representation
• Clear a certain digit of the number
• Convert the number to its opposite (used in conjunction with the negative sign operator)
• Mask operation

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