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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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1. Write a program to simplify a Boolean expression. The user will enter from the keyboard a string
representing a valid Boolean expression with spaces between the letters. The operators used will be OR
(+), AND (*) and NOT (~), and the only valid Input characters will be A, B, +, *, ~, ( , ), 1 and 0.
The expression will contain at most 3 operands, 3 operators and one set of parentheses. Output to the
screen a line printing the simplified equivalent of the given expression. Simplify means outputting the
fewest operators with no parentheses. Use the following list of Boolean Identities to simplify:
Refer to the sample output below.

Sample Runs (2):
Enter a string: ~(A + B)
Simplified expression: ~A * ~B
Enter a string: ~A * A + 1

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