How do you get doubles to round to the nearest tenth or hundreth?

[mattig89ch]

Hello all,

I'm doing a program that calculates money based on user inputs. I know I was taught how to get a double to round to the nearest second decimal place. But my first programming class was years ago now. So how can I get it to only either display, or just plain care about only the first 2 numbers after a decimal place?

[booradley60]

Have a look at this:
http://www.cplusplus.com/reference/iomanip/setprecision/