How to round to hundredths?

Question

Input: a=3,141592 b=5,566
Output: a=3,14 b=5,57

Answer 1

Multiply by 100, rounddown, and then divide by 100.

Include standard math library to use floor function

https://code.sololearn.com/cAdE12itxlps/?ref=app

Answer 2

The earliest way is to set precision

std::precision(number of positions +1);

https://code.sololearn.com/coguS2kSsZaw/?ref=app