Demonstrate bitwise 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
The complement of the number
#include <iostream>
using namespace std;
void show_binary(unsigned int u);
int main()
{
unsigned u = 123;
cout << "Here"s the number in binary: ";
show_binary(u);
cout << "Here"s the complement of the number: ";
show_binary(~u);
return 0;
}
void show_binary(unsigned int u)
{
int t;
for(t=128; t>0; t = t/2)
if(u & t) cout << "1 ";
else cout << "0 ";
cout << "\n";
}Here"s the number in binary: 0 1 1 1 1 0 1 1
Here"s the complement of the number: 1 0 0 0 0 1 0 0
