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How do you find the weakest precondition for the conditional statements below? if (x < 7) x = x*x; else x = x+1; { x >= 11 }

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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Question

How do you find the weakest precondition for the conditional statements below?
if (x < 7)

x = x*x;

else

x = x+1;

{ x >= 11 }

if (x != 0)

z = x;

else

z = x+1;

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