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++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter9: Completing The Basics
Section9.1: Exception Handling
Problem 4E
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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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