Starting Out with C++ from Control Structures to Objects (8th Edition)
Starting Out with C++ from Control Structures to Objects (8th Edition)
8th Edition
ISBN: 9780133769395
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 18, Problem 22RQE
Program Plan Intro

Stack:

A stack is type of container. It performs “Last In First Out”.

  • In stack, the item which is inserted at last will be retrieved first.
  • A stack can perform two operations. They are:
    • Push – Inserting an element inside a stack.
      • When the first element is pushed into the stack, the element will be at the “top” the stack. When the second element is added, the first element is pushed down and the second element will be at the top position, like this it goes on until the element which pushed at last will be at the top of the stack.
    • Pop – Deleting an element from the stack.
      • The element which is inserted at last will be deleted first.
  • The elements can be inserted and retrieved at any one end of the stack.

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[5 marks] Give a recursive definition for the language anb2n where n = 1, 2, 3, ... over the alphabet Ó={a, b}. 2) [12 marks] Consider the following languages over the alphabet ƒ={a ,b}, (i) The language of all words that begin and end an a (ii) The language where every a in a word is immediately followed by at least one b. (a) Express each as a Regular Expression (b) Draw an FA for each language (c) For Language (i), draw a TG using at most 3 states (d) For Language (ii), construct a CFG.

Chapter 18 Solutions

Starting Out with C++ from Control Structures to Objects (8th Edition)

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