C++ Rounding to the _nths place [duplicate]

Question

I'm currently learning c++ on a linux machine. I've got the following code for rounding down or up accordingly but only whole numbers. How would I change this code to round to the hundredths place or any other decimal? I wouldn't ask if I didn't try looking everywhere already :( and some answers seem to have a ton of lines for what seems to be a simple function!

double round( double ){
return floor(value + 0.5 );
}

Answer 1

Try

double round( double value )
{
    return floor( value*100 + 0.5 )/100;
}

to round to two decimal places.