Keywords: Abstract syntax tree for Euclidean algorithm.svg abstract syntax tree for the following pseudocode implementing the Euclidean algorithm to find the greatest common divisor of a and b while b ‰ 0 if a > b a a ˆ’ b else b b ˆ’ a return a own Dcoetzee 2011-03-22 Cc-zero Euclidean algorithm Syntax trees |