#include<iomanip>
setprecision(n)
double a=123.56789; 
    cout<<a<<endl;	
    cout<<setprecision(1)<<fixed<<a<<endl;
	cout<<setprecision(2)<<fixed<<a<<endl;
	cout<<setprecision(3)<<fixed<<a<<endl;
	cout<<setprecision(4)<<fixed<<a<<endl;
	cout<<setprecision(5)<<fixed<<a<<endl;
	cout<<setprecision(6)<<fixed<<a<<endl;
	
	
	


return 0;
}