File talk:Shunting yard.svg
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This example sucks. I don't think I could construct a more frustrating and ambiguous example. The ONE part of the algorithm that has any subtlety (step g) is completely masked by this illustration. Which + ends up on the stack? Which one's on the left?
Why in the world would you put two +s in there? Why? It's like you're intentionally making people misunderstand the algorithm. My god.