(define (call-the-cops)
(print "通報しますた！"))
(define (make-account balance password)
(let ((pwmiss 0))
(define (withdraw amount)
(if (>= balance amount)
(begin (set! balance (- balance amount))
balance)
"Insufficient funds"))
(define (deposit amount)
(set! balance (+ balance amount))
balance)
(define (dispatch pw m)
(if (eq? pw password)
(begin
(set! pwmiss 0)
(cond ((eq? m 'withdraw) withdraw)
((eq? m 'deposit) deposit)
(else (error "Unknown request -- MAKE-ACCOUNT" m))))
(begin
(set! pwmiss (+ pwmiss 1))
(when (> pwmiss 6) (call-the-cops))
(error "Incorrect password"))))
dispatch))
