Run a given program against an input

build.sh

#!/bin/bash

cd /code

if [ -e code.c ]; then
  gcc -o runner code.c || exit 1
  cat input | runner
elif [ -e code.cpp ]; then
  cat input | runner
elif [ -e code.rb ]; then
  cat input | ruby code.rb
elif [ -e code.py ]; then
  cat input | python code.py
else
  exit 1
fi