update

Task/FizzBuzz/Sed/fizzbuzz.sed

@@ -0,0 +1,40 @@
+#n
+# doesn't work if there's no input
+# initialize counters (0 = empty) and value
+s/.*/  0/
+: loop
+# increment counters, set carry
+s/^\(a*\) \(b*\) \([0-9][0-9]*\)/\1a \2b \3@/
+# propagate carry
+: carry
+s/ @/ 1/
+s/9@/@0/
+s/8@/9/
+s/7@/8/
+s/6@/7/
+s/5@/6/
+s/4@/5/
+s/3@/4/
+s/2@/3/
+s/1@/2/
+s/0@/1/
+/@/b carry
+# save state
+h
+# handle factors
+s/aaa/Fizz/
+s/bbbbb/Buzz/
+# strip value if any factor
+/z/s/[0-9]//g
+# strip counters and spaces
+s/[ab ]//g
+# output
+p
+# restore state
+g
+# roll over counters
+s/aaa//
+s/bbbbb//
+# loop until value = 100
+/100/q
+b loop