Courses/CS 460/Fall 2005/Homework/Xuong Tsan/Oct 1

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October 1st homework solutions

Contents 1 Homework Page 2 Count Element in the List 3 Sum a list of Integer 4 Simple Tree

[edit] Homework Page

Homework page is: | http://cs.calstatela.edu/~wiki/index.php/Courses/CS_460/Fall_2005/Homework/Xuong_Tsan

[edit] Count Element in the List

local
   fun {Count List}
      case List
      of nil then 0
      [] H|T then 1+{Count T}
      end
   end
in
   {Browse {Count [2 3 5 4]}}
end

[edit] Sum a list of Integer

 local
   fun{SumInt List}
      case List
      of nil then 0
      [] L|Ls then L+{SumInt Ls}
      end
   end
in
   {Browse {SumInt [2 3 5 6 4]}}
end

[edit] Simple Tree

declare T I Y LT RT W in 
T = tree(key:I value:Y left:LT right:RT)
I = seif
Y = 43
LT = nil
RT = nil
W = tree(I Y LT RT)
{Browse [T W]}