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Task/Sorting-algorithms-Shell-sort/Phix/sorting-algorithms-shell-sort.phix

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+function shell_sort(sequence s)
+integer gap = floor(length(s)/2), j
+object temp
+    while gap>0 do
+        for i=gap to length(s) do
+            temp = s[i]
+            j = i-gap
+            while j>=1 and temp<=s[j] do
+                s[j+gap] = s[j]
+                j -= gap
+            end while
+            s[j+gap] = temp
+        end for
+        gap = floor(gap/2)
+    end while
+    return s
+end function