sudo apt -y install indent

indent -kr -i8 -ts8 -sob -l80 -ss -ncs -linux -bs -psl

==========================================================

#!/bin/bash

for file in *.c *.cpp; do if [ -f "$file" ]; then indent -linux "$file" -o "$file.tmp" && mv "$file.tmp" "$file" fi done

==========================================================

Other options:

indent -kr -i8

indent -kr -i8 -linux

indent -kr -i8 -ts8 -sob -l80 -ss -bs -psl

indent -kr -i8 -ts8 -sob -l80 -ss -ncs