Help fix the errors, please

Question

Code in c++ embeded

Answer 1

Thank you very much Ipang and Simba , perfect now.

Answer 2

You missing a opening curly brace at the beginning

Answer 3

Line 6:
Add { as function body block start

Line 9 ~ 11:
New value for elements doesn't need to be inside a pair of curly brackets {}. This is not fatal, just unnecessarily done.

arr[0] = 0 - arr[1];
arr[1] = 1 - arr[2];
arr[2] = 2 - arr[0];

Line 12:
Remove } before the semicolon

Answer 4

https://code.sololearn.com/co53139Wz5Kx/?ref=app