New Perspectives on HTML and CSS: Brief
6th Edition
ISBN: 9781133387268
Author: Patrick M. Carey
Publisher: Cengage Learning US
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Question
Chapter 13, Problem 5RA
a)
Program Plan Intro
To create a function named calcCart() in file co_cart.js and within this function create a variable named orderCost as specified and display the value of orderCost variable in orderCostField.
b)
Program Plan Intro
To create a variable named shipCost within function calcCart as specified and display the value of shipCost variable in shippingCost field.
c)
Program Plan Intro
To display the sum of orderCost andshipCost in subtotal field within function calcCart.
d)
Program Plan Intro
To create a variable names salesTax within function calcCart and display the value of salesTaxvariable in salesTax field.
e)
Program Plan Intro
To displaythe sum of orderCost, shipCost and salesTax in cartTotal field within function calcCart.
f)
Program Plan Intro
To store the label text of the shipping option from the shipping files in the shippingType field.
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2. Signed Integers
Unsigned binary numbers work for natural numbers, but many calculations use negative
numbers as well. To deal with this, a number of different methods have been used to represent
signed numbers, but we will focus on two's complement, as it is the standard solution for
representing signed integers.
2.1 Two's complement
• Most significant bit has a negative value, all others are positive. So, the value of an n-digit
-2
two's complement number can be written as: Σ2 2¹ di 2n-1 dn
• Otherwise exactly the same as unsigned integers.
i=0
-
• A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1,
or 1 becomes 0) and then add 1 to the least significant bit.
• Addition is exactly the same as with an unsigned number.
2.2 Exercises
For questions 1-3, answer each one for the case of a two's complement number and an
unsigned number, indicating if it cannot be answered with a specific representation.
1. (15 pts) What is the largest integer…
Chapter 13 Solutions
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