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Package evaler implements a simple floating point arithmetic expression evaluator.Evaler uses Dijkstra's Shunting Yard algorithm  to convert an infix expression to postfix/RPN format , then evaluates the RPN expression. The implementation is adapted from a Java implementation at . The results are returned as a math/big *big.Rat.
ForevalZ is compiler of mathematical expressions(formulas) with complex numbers given as string at 'run-time' (math parser). (dll library + delphi component). For use in calculations with complex numbers.