week04.pdf - ICT167 Principles of Computer Science Lab Practice Week 4 You need to show working versions of your answers to all questions to your tutor

week04.pdf - ICT167 Principles of Computer Science Lab...

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ICT167 Principles of Computer Science 1 Lab Practice Week 4 You need to show working versions of your answers to all questions to your tutor. Your tutor will expect to see them by your next session. References: Topic 3 lecture slides, Chapter 5.2 and 5.3 NOTE: include internal documentation and comments in your code Do all the programs in NetBeans IDE. Today’s work builds on the fraction class which you produced for question 2 in Week 3’s lab practice. 1. Change your fraction class so that its instance variables numerator and denominator are hidden (i.e. private). Check that your old client class will now not compile (i.e. if the Fraction class instance variable name ‘numerator’ was used in the client class). Explain why. 2. Add a public method isZeroto your fraction class for testing whether the calling fraction is equal to the number zero (instead of a negative number). Modify your old client class so that it uses the isZero method to loop until a numerator of zero is
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