//a simple class for binary number
#include <iostream.h>
class BIN{
	long data;
    friend ostream operator<< (ostream&, const BIN&);
    public:
    	BIN(){data=0;};
    	BIN(long);
    	BIN(BIN& x)   // copy constructor
    	{ cout << "(copy)";
    	    // data = x.data;
    	 }
};
BIN::BIN(long x) { data=x; }
int main()
{
	long m;
	BIN y;
   m=126;
   y=m;
   cout << "m=" << m;
   cout << "=== y =" << y;
   cout << endl;;
   BIN x=y; // will call copy constructor
   cout << "\t x= " << x;
   cout << endl;
   cout << "What if the copy constructor is removed?\n\n";
   while(m){
      cout << "Input an integer:";
      cin >> m;
      cout << "===" << (BIN)m;
      cout << " = " << m << endl;
   }
   cout << "Thank you for using AT&T:-)\n";
}
ostream operator<< (ostream& oo, const BIN& x)
{
	long tmp,i;
	tmp = x.data;
	for(i=1; i<=32; i++){
	   if(tmp<0) oo << 1;
	   else oo << 0;
	   if(i%4 == 0) oo << " ";
	   tmp = tmp << 1;
	}
	return (ostream)oo;
}