December 2013
Beginner
576 pages
16h 4m
English
Content preview from Programming in Objective-C, Sixth Edition
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Exercises
1. Add a Convert button to the fraction calculator application. When the button is pressed, use the Fraction class’s convertToNum method to produce the numeric representation of the fractional result. Convert that result to a string and show it in the calculator’s display.
2. Modify the fraction calculator application so that a negative fraction can be entered if the – key gets pressed before a numerator is entered.
3. If the value of zero is keyed in for a denominator for either the first or second operand, display the string Error in the fraction calculator’s display.
4. Modify the fraction calculator application so that calculations can be chained. For example, allow for the following operation to be keyed:
1/5 + 2/7 – 3/8 =
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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