Set width and precision in iostream of STD

1. Call precision and width close to cout;
2. fixed to enforce to show a float as 23.45 format

int nLine = 1; for ( int i = 0; i < 100; i += 5)
{
cout.precision( 2); cout.width( 6);
cout << fixed << inch2cm( i) << " ";
if ( nLine % 10 == 0)
{ cout << endl; }
nLine++;
}