<oerjan> learn `edit <file> gives you a url, then in your browser: (1) Press Fetch (2) Make your changes (3) Press edit (4) Paste the command line at the top into the channel.

#!/bin/bash
sed s:\\n:\n:g >/tmp/in.cpp <<<"$@"; g++ -o /tmp/a.out /tmp/in.cpp; /tmp/a.out