directorylist in shell sh-Script

directorylist in shell sh-Script

i have a sh-Script with:
#!/bin/sh
dirs=( $(find . -maxdepth 1 -type d -printf '%P\n') )
echo "There are ${#dirs[@]} dirs in the current path"
let i=1
for dir in "${dirs[@]}"; do
echo "$((i++)) $dir"
done
answer=2
echo "you selected ${dirs[$answer]}!"
But i got the error:
symfonymenu.sh: Syntax error: "(" unexpected (expecting "}")
its the line ...dirs=
I like to echo all available directories in a folder that user can select
it in a prompt interface.