PostFixExp.java - public interface PostFixExp Set a new expression written in postfix notation Tokens are separated by a space void setExp(String exp

PostFixExp.java - public interface PostFixExp Set a new...

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public interface PostFixExp { // Set a new expression written in postfix notation. Tokens are separated by a space. void setExp(String exp); // Return the expression in postfix notation. Tokens are separated by a space. String getExp(); // Return the operands stack after parsing k tokens. If an error is encountered before k tokens are parsed, null is returned. An error can be a syntax error or division by zero. Assume that k is valid. Stack<Integer> evaluate(int k); // Check if the expression is valid (no syntax error and no division by
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Unformatted text preview: zero). If the expression is invalid, the index of the token that caused the error is returned. If the expression is valid, the method returns -1. int validate(); // Return the expression in infix notation. If a syntax error is encountered, null is returned (notice that division by zero is not considered an error here). Parentheses must be put around every operation, like &quot;( ( 3 * 2 ) + ( 6 / 3 ) )&quot;. Tokens must be separated by a space. InFixExp toInFix(); }...
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  • Spring '13
  • james joshi

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