io-test.egi

(define $main
  (lambda [$:]
    (do {[$: (print : "input char : ")]
         [[$: $c] (read-char :)]
         [$: (print : "output : ")]
         [$: (write-char : c)]
         [$: (write-char : '\n')]
         [$: (print : "input number :")]
         [[$: $e] (read :)]
         [$: (print : "output : ")]
         [$: (write : (* 2 e))]
         [$: (write-char : '\n')]}
      :)))