Export (0) Print
Expand All

Bitwise AND Operator: &

Grammar

and-expression:
equality-expression
and-expression & equality-expression

The bitwise AND operator (&) compares each bit of the first operand to the corresponding bit of the second operand. If both bits are 1, the corresponding result bit is set to 1. Otherwise, the corresponding result bit is set to 0.

Both operands to the bitwise AND operator must be of integral types. The usual arithmetic conversions covered in Arithmetic Conversions, are applied to the operands.

Operator Keyword for &

The bitand operator is the text equivalent of &. There are two ways to access the bitand operator in your programs: include the header file iso646.h, or compile with the /Za (Disable language extensions) compiler option.

Example

// expre_Bitwise_AND_Operator.cpp
// compile with: /EHsc
// Demonstrate bitwise AND
#include <iostream>
using namespace std;
int main() {
   unsigned short a = 0xFFFF;      // pattern 1111 ...
   unsigned short b = 0xAAAA;      // pattern 1010 ...

   cout  << hex << ( a & b ) << endl;   // prints "aaaa", pattern 1010 ...
}

See Also

C++ Bitwise Operators | C++ Operators | Operator Precedence and Associativity | Bitwise Operators (C Reference)

Show:
© 2014 Microsoft