Cut off numbers/words

[Zeldami]

Hi people,
I'd like to know if (and how) you can cut off numbers and words.
Example:
I have:

double = 1.23456789

How do I cut off till I have 2 (or 3) decimals left.

[mcleano]

http://www.cplusplus.com/reference/iostream/manipulators/setprecision/

[Zeldami]

Thanks =)
Now I remember I've seen that before =D