bitset::operator&=

bitset::operator&=

 

Performs a bitwise combination of bitsets with the logical AND operation.


      bitset<N>& operator&=(
   const bitset<N>& _Right
);

_Right

The bitset that is to be combined bitwise with the target bitset.

The modified target bitset that results from the bitwise AND operation with the bitset specified as a parameter.

Two bits combined by the AND operator return true if each bit is true; otherwise, their combination returns false.

Bitsets must be of the same size to be combined bitwise with the AND operator by the member operator function.

Example

// bitset_op_bitwise.cpp
// compile with: /EHsc
#include <bitset>
#include <iostream>

int main( )
{
   using namespace std;

   bitset<5> b1 ( 7 );
   bitset<5> b2 ( 11 );
   bitset<4> b3 ( 7 );

   cout << "The target bitset b1 is:    ( "<< b1 << " )." << endl;
   cout << "The parameter bitset b2 is: ( "<< b2 << " )." << endl;
   cout << endl;

   b1 &= b2;
   cout << "After bitwise AND combination,\n"
        << " the target bitset b1 becomes:   ( "<< b1 << " )." 
        << endl;

   // Note that the parameter-specified bitset is unchanged
   cout << "The parameter bitset b2 remains: ( "<< b2 << " )." 
        << endl;

   // The following would cause an error because the bisets 
   // must be of the same size to be combined
   // b1 &= b3;
}
The target bitset b1 is:    ( 00111 ).
The parameter bitset b2 is: ( 01011 ).

After bitwise AND combination,
 the target bitset b1 becomes:   ( 00011 ).
The parameter bitset b2 remains: ( 01011 ).

Requirements

Header: <bitset>

Namespace: std

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