Arithmetic evaluation: Difference between revisions
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A program which parsers and evaluates arithmetic expressions. Requirements: an AST for the expression must be created from parsing the input, the AST must be used in evaluation also, so no calling eval or similar if the language has such a thing. |
A program which parsers and evaluates arithmetic expressions. Requirements: an AST for the expression must be created from parsing the input, the AST must be used in evaluation also, so no calling eval or similar if the language has such a thing. The expression will be a string or list of symbols like "(1+3)*7". + - * / as binary operators must be supported including precedence levels, as well as parentheses. |
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The expression will be a string of list of symbols like "(1+3)*7". |
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For those who don't remember, mathematical precedence is as follows: |
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+ - * / as binary operators must be supported including precedence levels, as well as paranthesis. |
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Parentheses |
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Exponents (not in this program) |
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Multiplication/Division (left to right) |
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Addition/Subtraction (left to right) |
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=={{header|Prolog}}== |
=={{header|Prolog}}== |
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