cpp22.cpp

C++参考书

// Coded by plusir -- Jan.11.2003.
// Standard C++ Bible -- (P632-22-22)

#include <iostream>
#include <bitset>
using namespace std ;

const int SIZE = 8 ;

ostream& operator << ( ostream &output, bitset<SIZE> &bs )
{
	output << "Bitset = " ;
	for ( int i = 0; i < SIZE; ++i )
		output << bs[i] ;
	output << endl ;

	return output ;
}

int main()
{
	bitset<SIZE> bitSet ;

	bitSet.set( 1 ) ;
	bitSet.set( 2 ) ;
	bitSet.set( 3 ) ;
	bitSet.set( 5 ) ;
	bitSet.set( 7 ) ;

	cout << bitSet << endl ;

	for ( int i = 0; i < SIZE; i++ ) {
		cout << "Bit " << i << " is " ;
		if ( bitSet.test( i ) )
			cout << "set" << endl ;
		else
			cout << "unset" << endl ;
	}

	return 0 ;
}