Postfix notation is a mathematical notation in which operators follow their operands. In other words, pfexp1 pfexp2 op, where pfexp1 and pfexp2 are both postfix expressions. Some examples: 2 2+ is the postfix notation of the expression 2 + 2. 2 3 * 1 - 5 / is the postfix notation of the expression ((2 * 3) - 1) / 5. Here you have to compute the result from a postfix expression. Examples postfix ("2 2 +") 4 // 2 + 2 = 4 postfix ("2 3 * 1 // ((2 * 3) - 1) - 5 /") → 1 -> / 5 = (6 - 1) / 5 = 5 / 5 = 1

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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Postfix notation is a mathematical notation in which operators follow their operands. In
other words, pfexp1 pfexp2 op, where pfexp1 and pfexp2 are both postfix expressions.
Some examples:
+ is the postfix notation of the expression 2 + 2.
2 3 * 1 - 5 / is the postfix notation of the expression ((2 * 3) - 1) / 5.
Here you have to compute the result from a postfix expression.
Examples
postfix ("2 2 +") -4
// 2 + 2 = 4
postfix ("2 3 * 1
5 /") → 1
// ((2 * 3) - 1) / 5 = (6 - 1) / 5 = 5 / 5 = 1
-
Transcribed Image Text:Postfix notation is a mathematical notation in which operators follow their operands. In other words, pfexp1 pfexp2 op, where pfexp1 and pfexp2 are both postfix expressions. Some examples: + is the postfix notation of the expression 2 + 2. 2 3 * 1 - 5 / is the postfix notation of the expression ((2 * 3) - 1) / 5. Here you have to compute the result from a postfix expression. Examples postfix ("2 2 +") -4 // 2 + 2 = 4 postfix ("2 3 * 1 5 /") → 1 // ((2 * 3) - 1) / 5 = (6 - 1) / 5 = 5 / 5 = 1 -
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