C++ Programming: From Problem Analysis to Program Design
C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN: 9781337102087
Author: D. S. Malik
Publisher: Cengage Learning
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We can define an alphabet as a set of characters to be used in creating strings. Let A = {a,b} be an alphabet.
We define A* to be all strings of length 0 or more made up only of letters in the alphabet A. (The length
of a string is the number of characters in it.)
(a) Write a recursive definition for A*.
(b) Write a recursive definition for A* -A, i.e. all strings of length 1 or more that can be made with the
letters in A.
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Transcribed Image Text:We can define an alphabet as a set of characters to be used in creating strings. Let A = {a,b} be an alphabet. We define A* to be all strings of length 0 or more made up only of letters in the alphabet A. (The length of a string is the number of characters in it.) (a) Write a recursive definition for A*. (b) Write a recursive definition for A* -A, i.e. all strings of length 1 or more that can be made with the letters in A.
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