PLC Laboratory 7 - Revision history

Beh01 at 09:07, 30 March 2022

2022-03-30T09:07:40Z

2022-03-30T08:50:01Z

2022-03-30T08:43:29Z

2022-03-16T13:30:29Z

2022-01-27T10:02:12Z

2022-01-27T08:52:13Z

2022-01-25T11:28:54Z

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← Older revision		Revision as of 09:07, 30 March 2022
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	</syntaxhighlight >		</syntaxhighlight >
		+
		+	== Solution ==
		+
		+	* You can download the solution: [http://linedu.vsb.cz/~beh01/wiki_data/PLC_Lab7_solution.zip PLC_Lab7_solution.zip]

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 Using ANTLR, implement an interpreter of arithmetic expressions. These expressions contain +, -, *, / operators (with common priorities and left associativity) and parentheses. To simplify the task, consider we have only binary operators. There are no unary operators in our language.
-As a starting point, you can use following ANTLR grammar (it describes different kind of expressions): [http://linedu.vsb.cz/~beh01/wiki_data/PLC_lab7_expr.g4 ANTLR input file]
+As a starting point, you can use following ANTLR grammar (it describes different kind of expressions): [http://linedu.vsb.cz/~beh01/wiki_data/PLC_Lab7_expr.g4 ANTLR input file]
 == Input specification ==

@@ Line 3: / Line 3: @@
 Using ANTLR, implement an interpreter of arithmetic expressions. These expressions contain +, -, *, / operators (with common priorities and left associativity) and parentheses. To simplify the task, consider we have only binary operators. There are no unary operators in our language.
-As a starting point, you can use following ANTLR grammar (it describes different kind of expressions) [http://linedu.vsb.cz/~beh01/wiki_data/PLC_lab7_expr.g4 ANTLR input file]
+As a starting point, you can use following ANTLR grammar (it describes different kind of expressions): [http://linedu.vsb.cz/~beh01/wiki_data/PLC_lab7_expr.g4 ANTLR input file]
 == Input specification ==

← Older revision		Revision as of 13:30, 16 March 2022
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	Using ANTLR, implement an interpreter of arithmetic expressions. These expressions contain +, -, *, / operators (with common priorities and left associativity) and parentheses. To simplify the task, consider we have only binary operators. There are no unary operators in our language.		Using ANTLR, implement an interpreter of arithmetic expressions. These expressions contain +, -, *, / operators (with common priorities and left associativity) and parentheses. To simplify the task, consider we have only binary operators. There are no unary operators in our language.
		+
		+	As a starting point, you can use following ANTLR grammar (it describes different kind of expressions) [http://linedu.vsb.cz/~beh01/wiki_data/PLC_lab7_expr.g4 ANTLR input file]

	== Input specification ==		== Input specification ==

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 == Input specification ==
-In the input, there are expressions, they are writtent with free formatting. Each expression ends with semicolon. Numbers can be written similarly to C language constants. it can be either: decimal , octal (starting with zero) or hexadecimal (starting with characters 0x) number.
+In the input, there are expressions, they are written in formatting. Each expression ends with semicolon. Numbers can be written similarly to C language constants. it can be either: decimal , octal (starting with zero) or hexadecimal (starting with characters 0x) number.
 == Output specification ==

← Older revision	Revision as of 08:52, 27 January 2022
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	+	== Interpreter of Arithmetic Expressions Using ANTLR ==

	+	Using ANTLR, implement an interpreter of arithmetic expressions. These expressions contain +, -, *, / operators (with common priorities and left associativity) and parentheses. To simplify the task, consider we have only binary operators. There are no unary operators in our language.
	+
	+	== Input specification ==
	+
	+	In the input, there are expressions, they are writtent with free formatting. Each expression ends with semicolon. Numbers can be written similarly to C language constants. it can be either: decimal , octal (starting with zero) or hexadecimal (starting with characters 0x) number.
	+
	+	== Output specification ==
	+
	+	For each expression write one line containing the result – the computed value of the expression. If there is any error in the input, you can stop the computation.
	+
	+	== Example ==
	+	* Input
	+	<syntaxhighlight lang="haskell" >
	+	012-10; 2 * (0xff+5);
	+	0x23e5-0x201;
	+	</syntaxhighlight >
	+
	+	* Output
	+	<syntaxhighlight lang="haskell" >
	+	0
	+	520
	+	8676
	+	</syntaxhighlight >