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BSD 4.3

#  This program tests lib/pret.s.

procedure main()
   write(fib(10))
   write(fib(20))
end

procedure fib(i)
   static fibmem
   local j
   initial {
      fibmem := table()
      fibmem[1] := fibmem[2] := 1
      }
   if j := \fibmem[i] then return j
   else return fibmem[i] := fib(i - 1) + fib(i - 2)
end

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