Computers and Technology, 08.07.2021 04:50 colbygreen6189

This class represents the expression as a whole, and consists all the following steps of the evaluation process: 1. (25 points) buildSymbols - This method populates the two instance fields, scalars and arrays, with all simple (scalar) variables, and all array variables, respectively, that appear in the expression. You will fill in the implementation of this method. Make sure to read the comments above the method header to get more details. 2. loadSymbolValues - This method reads values for all scalars and arrays from a file, into the ScalarSymbol and ArraySymbol objects stored in the scalars and arrays array lists. This method is already implemented, do not make any changes. 3. (75 points) evaluate - This method evaluates the expression. You will fill in the implementation of this method. You MUST use RECURSION to evaluate parenthesized subexpressions and array index expressions. You can write a separate private recursive method and call it from this public method.

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