valarray::operator>>=

Right-shifts the bits for each element of a valarray operand a specified number of positions or by an element-wise amount specified by a second valarray.

valarray<Type>& operator>>=(
   const valarray<Type>& _Right
);
valarray<Type>& operator>>=(
   const Type& _Right
);

Parameters

• _Right
  The value indicating the amount of right shift or valarray whose elements indicate the element-wise amount of right shift.

Return Value

A valarray whose elements have been shifted right the amount specified in _Right.

Remarks

Signed numbers have their signs preserved.

Example

// valarray_class_op_rs.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>

int main( )
{
   using namespace std;
   int i;

   valarray<int> vaL ( 8 ), vaR ( 8 );
   for ( i = 0 ; i < 8 ; i += 2 )
      vaL [ i ] =  64;
   for ( i = 1 ; i < 8 ; i += 2 )
      vaL [ i ] =  -64;
   for ( i = 0 ; i < 8 ; i++ )
      vaR [ i ] =  i;
   
   cout << "The initial operand valarray is: ( ";
      for ( i = 0 ; i < 8 ; i++ )
         cout << vaL [ i ] << " ";
   cout << ")." << endl;

   cout << "The _Right valarray is: ( ";
      for ( i = 0 ; i < 8 ; i++ )
         cout << vaR [ i ] << " ";
   cout << ")." << endl;

   vaL >>= vaR;
   cout << "The element-by-element result of "
        << "the right shift is the\n valarray: ( ";
      for ( i = 0 ; i < 8 ; i++ )
         cout << vaL [ i ] << " ";
   cout << ")." << endl;
}

The initial operand valarray is: ( 64 -64 64 -64 64 -64 64 -64 ).
The _Right valarray is: ( 0 1 2 3 4 5 6 7 ).
The element-by-element result of the right shift is the
 valarray: ( 64 -32 16 -8 4 -2 1 -1 ).

Requirements

Header: <valarray>

Namespace: std

See Also

Concepts

valarray Class

valarray Members