How do I select how many decimal places are displayed on my screen

Question

I am writing a code in c++ to give tax and tip and I am using double but i only want it to display numbers in the tenths place how do I fix the problem I am having

Answer 1

Use setprecision() function as follows :)

https://code.sololearn.com/cKY9zxKlRma2/#cpp

Edit: Another way using printf():

https://code.sololearn.com/cAO0mdqJR7Wp/#cpp