import reader
import sys

def main():
	print("Welcome message.")
	outputfile = "output.txt" if len(sys.argv) == 1 else sys.argv[1]
	interpreter = reader.Reader(outputfile)
	# REPL Loop
	while True:
		try:
			expression: str = input("> ").upper()
		except KeyboardInterrupt:
			print("\n>> bye")
			return
		except EOFError:
			print("\n>> bye")
			return
		interpreter.tokenize(expression)
		interpreter.run()

if __name__ == "__main__":
	main()