Compute the weakest precondition for each of the following assignment statements and selection constructs. Detailed steps are needed. a = 2 * (b - 1) - 1 {a > 0} a = 2 * b + 1 b = a - 3 {b < 0} if (a == b) b = 2 * a + 1 else b = 2 * a {b > 1}

Compute the weakest precondition for each of the following assignment statements and selection constructs. Detailed steps are needed. a = 2 * (b - 1) - 1 {a > 0} a = 2 * b + 1 b = a - 3 {b < 0} if (a == b) b = 2 * a + 1 else b = 2 * a {b > 1}

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter2: Elements Of High-quality Programs

Section: Chapter Questions

Problem 9RQ

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Question

Compute the weakest precondition for each of the following assignment statements and selection constructs. Detailed steps are needed.

a = 2 * (b - 1) - 1 {a > 0}

a = 2 * b + 1

b = a - 3 {b < 0}

if (a == b)

b = 2 * a + 1

else

b = 2 * a

{b > 1}

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