Demonstrate bitwise complement : complement « Operators statements « C++ Tutorial

1. C++ Tutorial
2. Operators statements
3. complement

#include <iostream>
using std::cout;

#include <iomanip>
using std::endl;
using std::setw;

void displayBits( unsigned );

int main()
{
   unsigned number1;
   unsigned number2;
   unsigned mask;
   unsigned setBits;

   number1 = 21845;
   cout << "\nThe one's complement of\n";
   displayBits( number1 );
   cout << "is" << endl;
   displayBits( ~number1 );


   return 0;
}

//Quote from
//C++ How to Program (5th Edition) (How to Program) (Paperback)
//by Harvey & Paul) Deitel & Associates

//Publisher: Prentice Hall; 5 edition (January 5, 2005)
//Language: English
//ISBN-10: 0131857576
//ISBN-13: 978-0131857575

void displayBits( unsigned value ) {
   const int SHIFT = 8 * sizeof( unsigned ) - 1;
   const unsigned MASK = 1 << SHIFT;

   cout << setw( 10 ) << value << " = ";

   for ( unsigned i = 1; i <= SHIFT + 1; i++ ) {
      cout << ( value & MASK ? '1' : '0' );
      value <<= 1;

      if ( i  8 == 0 )
         cout << ' ';
   }

   cout << endl;
}

The one's complement of
     21845 = 00000000 00000000 01010101 01010101
is
4294945450 = 11111111 11111111 10101010 10101010