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  1. Wollomi

    User input of variable names and formulas

    Thanks everyone for your suggestions. I followed IanAtCidac's suggestion and found that a fellow by the name of Konstantin Tretyakov had written a routine he calls an Expression Evaluator, which is in fact a very impressive Recursive Descent Parser as Mike Lacey mentioned. It returns the result...
  2. Wollomi

    User input of variable names and formulas

    I am writing an application in which I want to enable the user to define variable names and enter formulas into text boxes on a form, which are then used within the code. It is to be used by ecologists in creating and testing simple ecosystem models. For example the user might enter 'Salinity'...

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