(define (double f) (lambda (x) (f (f x))))(define (inc x) (+ x 1))(((double (double double)) inc) 5);amazing(((double (double (double double))) inc) 0)
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(define (double f) (lambda (x) (f (f x))))(define (inc x) (+ x 1))(((double (double double)) inc) 5);amazing(((double (double (double double))) inc) 0)
转载于:https://www.cnblogs.com/R4mble/p/8395347.html