Initial data commit

Task/Mutual-recursion/Sather/mutual-recursion.sa

@@ -0,0 +1,26 @@
+class MAIN is
+
+  f(n:INT):INT
+    pre n >= 0
+  is
+    if n = 0 then return 1; end;
+    return n - m(f(n-1));
+  end;
+
+  m(n:INT):INT
+    pre n >= 0
+  is
+    if n = 0 then return 0; end;
+    return n - f(m(n-1));
+  end;
+
+  main is
+    loop i ::= 0.upto!(19);
+      #OUT + #FMT("%2d ", f(i));
+    end;
+    #OUT + "\n";
+    loop i ::= 0.upto!(19);
+      #OUT + #FMT("%2d ", m(i));
+    end;
+  end;
+end;