Verify that the program segment ifx < 0 then abs := -x else abs := x is correct with respect to the initial assertion T and the final assertion abs = Ix I.

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter15: Recursion
Section: Chapter Questions
Problem 8SA
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Verify that the program segment
ifx < 0 then
abs := -x
else
abs := x
is correct with respect to the initial assertion T and the final assertion abs = Ix I.

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