Stuff

#include <iostream>std::ostream & printBinary ( const int n, std::ostream & os );int size;int main ( int argc, char **argv ) {	int n;	switch ( sizeof ( int ) ) {		case 8:	size = 64;	break;		case 4:	size = 32;	break;		case 2:	size = 16;	break;		case 1:	size = 8;	break;	}	std::cout << "sizeof int: " << size << std::endl;	std::cout << "Number: ";	while ( std::cin >> n ) {		std::cout << "Decimal: " << n << std::endl;		std::cout << "Binary: ";		std::cout << printBinary ( n, std::cout );		std::cout << std::endl;		std::cout << "Number: ";	}	return 0;}std::ostream & printBinary ( const int n, std::ostream & os ) {	for ( int i = size; i > 0; i-- )		os << ((i%4&&i<size)?"":" ") << ((n >> (i-1)) & 1);	return os;}