X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=cps_and_continuation_operators.mdwn;h=f619fc0f9bf414503e768e897c66a6d550283f58;hp=fadd34d316d57471331419cdc49d76e36088f6e4;hb=413169d31f1670ffd98d2af8a962c050151cf662;hpb=61612ba6746dc4646fb0d5bb1c9e1864bf927848

diff --git a/cps_and_continuation_operators.mdwn b/cps_and_continuation_operators.mdwn
index fadd34d3..f619fc0f 100644
--- a/cps_and_continuation_operators.mdwn
+++ b/cps_and_continuation_operators.mdwn
@@ -357,10 +357,10 @@ Here is the hardest example. Try to figure out what this function does:
 	                     ; is this the only case where walk returns a non-atom?
 	                     [(null? l) '()]
 	                     [(atom? (car l)) (begin
-	                                        (let/cc k2
+	                                        (let/cc k2 (begin
 	                                          (set! resume k2) ; now what will happen when resume is called?
 	                                          ; when the next line is executed, what will yield be bound to?
-	                                          (yield (car l)))
+	                                          (yield (car l))))
 	                                        ; when will the next line be executed?
 	                                        (walk (cdr l)))]
 	                     [else (begin
@@ -368,10 +368,10 @@ Here is the hardest example. Try to figure out what this function does:
 	                             (walk (car l))
 	                             (walk (cdr l)))]))]
 	           [next (lambda () ; next is a thunk
-	                   (let/cc k3
+	                   (let/cc k3 (begin
 	                     (set! yield k3) ; now what will happen when yield is called?
 	                     ; when the next line is executed, what will resume be bound to?
-	                     (resume 'blah)))]
+	                     (resume 'blah))))]
 	           [check (lambda (prev)
 	                    (let ([n (next)])
 	                      (cond
@@ -380,11 +380,11 @@ Here is the hardest example. Try to figure out what this function does:
 	                        ; when will n fail to be an atom?
 	                        [else #f])))])
 	    (lambda (lst)
-	      (let ([fst (let/cc k1
+	      (let ([fst (let/cc k1 (begin
 	                   (set! yield k1) ; now what will happen when yield is called?
 	                   (walk lst)
 	                   ; when will the next line be executed?
-	                   (yield '()))])
+	                   (yield '())))])
 	        (cond
 	          [(atom? fst) (check fst)]
 	          ; when will fst fail to be an atom?