> #include<iostream.h>
> #include<iomanip.h>
> double fac(int n)
> {
> 	double f;
> 	if(n==1) f=0.5;
> 	else f=fac(n-1)+1.0/(2*n);
> 	return f;
> }
> void main()
> {
>     long int n;
> 	cout<<"Cards  Overhang "<<endl;
> 	while(cin){
> 		cin>>n;
> 		if(n<=0) cout<<"    0     0.000"<<endl;
> 		else if(n<=3) cout<<setw(5)<<n<<"  "<<setw(8)<<setiosflags(ios::showpoint)<<setprecision(3)<<fac(n)<<endl;
> 		else
> 			cout<<resetiosflags(ios::fixed)<<setw(5)<<n<<"  "<<setw(8)<<setprecision(4)<<fac(n)<<endl;
> 	}
> }