Csci 457 assignment 2 – hexadecimal calculator

Implement a hexadecimal calculator for iOS.

Requirements:
  • The calculator should support 4 basic arithmetic
    operations: + – * and /
  • The calculator will operate on hexadecimal numbers, not
        decimal numbers 
  • The calculator only needs to operate on unsigned integers
    (i.e. UInt). You do not need to consider negative numbers
    or fractions.
  • The calculator should support the 16-digit hexadecimal
    numbers (i.e. The range of the numbers is from 0 to FFFF FFFF FFFF FFFF). Prevent the user from entering a number that is greater than FFFF FFFF FFFF FFFF.
  • The calculator should handle overflow and underflow gracefully. The app must not crash.
  • The calculator should handle division-by-zero error gracefully. The app must not crash.
  • The calculator should be able to support most of the devices and orientations. If it does not support the old devices earlier than iPhone 6, it is okay.
    Hint:
  • To convert a string to a hex number, use “radix: 16” as an
    argument. For example:
    var s:String?
    s = “1A”
    var intHex:UInt = 0
    intHex = UInt(s!, radix: 16)! print(intHex) // shows 26
    intHex = 90
    s = String(intHex, radix: 16).uppercased() print(s!) // shows 5A
  • It is recommended that you use a UI label instead of a text field, so that the user will not type directly by using a keyboard. You will need to provide a button for each digit.
  • Strings may be concatenated by using + operator. E.g. var s1 = “1234”

var s2 = “5”
print(s1 + s2) // shows 12345
You may want to do string concatenation in the action of each digit button.

  • To prevent the user from entering a number exceeding the size of 16 digits, you may verify the length of the string associated with the UI label.
  • To handle overflow and underflow, use &+, &-, and &* instead of +, -, and *.
  • To support different devices and orientations, use stack view, scroll view, or both.
  • Design your algorithm first! Think about the status of the calculator: when to take the first operand, when to take the second operand, when to append digits to the current number, and when to refresh the current number, etc.
    The functionality of your hex calculator worth 60% of the credit, while the appearance of the user interface worth 40%.
    When you submit the assignment, please compress the entire project folder into a single zip file, and upload it to D2L. In addition, please provide 4 to 5 screenshots of your app in different devices and orientations. If your app doesn’t work on every device/orientation, please specify why.
    The screenshots of a sample program are shown below. Your UI does not have to be the same as the sample program. As long as it has a pleasing looking, it should be fine.

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

STAY HOME, SAVE LIVES. Order your essay today and save 20% with the discount code ATOM