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|
#!/bin/sh
{
printf '('
for i in $(seq "$(head -n1 input | wc -c)")
do
num="$(cut -c $i input | paste -sd '')"
num="${num%${num##*[![:space:]]}}"
case "$num" in
*[+*])
test -n "$op" && printf ') + ('
op="${num#${num%?}}"
num="${num%?}"
printf '%d %s ' $num "$op"
;;
'')
test "$op" = +
printf '%d' $?
;;
*)
printf '%d %s ' $num "$op"
;;
esac
done
printf ')\n'
} | bc
|
