Initial data commit

Task/Mutual-recursion/BCPL/mutual-recursion.bcpl

@@ -0,0 +1,20 @@
+get "libhdr"
+
+// Mutually recursive functions
+let f(n) = n=0 -> 1, n - m(f(n-1))
+and m(n) = n=0 -> 0, n - f(m(n-1))
+
+// Print f(0..15) and m(0..15)
+let start() be
+$(  writes("F:")
+    for i=0 to 15 do
+    $(  writes(" ")
+        writen(f(i))
+    $)
+    writes("*NM:")
+    for i=0 to 15 do
+    $(  writes(" ")
+        writen(m(i))
+    $)
+    writes("*N")
+$)