demo_Complex = do
  print ((Complex 1 1) + (Complex 2 2))
  print ((Complex 1 1) - (Complex 2 2))
  print ((Complex 1 1) * (Complex 2 2))
  print ((Complex 1 1) + 0)
  print (- (Complex 1 1))
demo_Complex = do
  print ((Complex 1 1) + (Complex 2 2))
  print ((Complex 1 1) - (Complex 2 2))
  print ((Complex 1 1) * (Complex 2 2))
  print ((Complex 1 1) + 0)
  print (- (Complex 1 1))
demo_Complex = do
  print ((Complex 1 1) + (Complex 2 2))
  print ((Complex 1 1) - (Complex 2 2))
  print ((Complex 1 1) * (Complex 2 2))
  print ((Complex 1 1) + 0)
  print (- (Complex 1 1))