width(),precision(),fill()

#include < iostream >
using namespace std;

int main()
{
    cout.width(10);
    cout << "hello" << '\n';
    cout.fill('%');
    cout.width(10);
    cout << "hello" << '\n';
    cout.setf(ios::left);
    cout.width(10);
    cout << "hello" << '\n';
    
    
    cout.width(10);
    cout.precision(10);
    cout << 123.234567 << '\n';
    cout.width(10);
    cout.precision(6);
    cout << 123.234567 << '\n';
    return 0;
}