inspired from https://github.com/DQNEO/HowToWriteACompiler
sbt reload
sbt assembly
echo "2" | java -jar target/scala-2.13/scc-assembly-0.1.jar | ./asrun.sh #2
echo "-2" | java -jar target/scala-2.13/scc-assembly-0.1.jar | ./asrun.sh #254
echo "21 * 2" | java -jar target/scala-2.13/scc-assembly-0.1.jar | ./asrun.sh #42