Introduction to Programming with C++
3rd Edition
ISBN: 9780133252811
Author: Y. Daniel Liang
Publisher: Prentice Hall
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Textbook Question
Chapter 4, Problem 1PE
(Geometry: area of a pentagon) Write a
The formula for computing the area of a pentagon is
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(Python matplotlib or seaborn)
CPU Usage
We have the hourly average CPU usage for a worker's computer over the course of a week. Each row of data represents a day of the week starting with Monday. Each column of data is an hour in the day starting with 0 being midnight.
Create a chart that shows the CPU usage over the week. You should be able to answer the following questions using the chart:
When does the worker typically take lunch?
Did the worker do work on the weekend?
On which weekday did the worker start working on their computer at the latest hour?
cpu_usage = [
[2, 2, 4, 2, 4, 1, 1, 4, 4, 12, 22, 23,
45, 9, 33, 56, 23, 40, 21, 6, 6, 2, 2, 3], # Monday
[1, 2, 3, 2, 3, 2, 3, 2, 7, 22, 45, 44,
33, 9, 23, 19, 33, 56, 12, 2, 3, 1, 2, 2], # Tuesday
[2, 3, 1, 2, 4, 4, 2, 2, 1, 2, 5, 31,
54, 7, 6, 34, 68, 34, 49, 6, 6, 2, 2, 3], # Wednesday
[1, 2, 3, 2, 4, 1, 2, 4, 1, 17, 24, 18,
41, 3, 44, 42, 12, 36, 41, 2, 2, 4, 2, 4], # Thursday
[4, 1, 2, 2, 3, 2, 5, 1, 2, 12, 33, 27,
43, 8,…
5.
(Algebra: solve 2 X 2 linear equations) You can use Cramer's rule to solve the
following 2 X 2 system of linear equation:
ax + by = e
cx + dy = f
●
x =
ed - bf
bc
ad
y =
af - ec
ad
bc
-
Write a program that prompts the user to enter a, b, c, d, e, and f and display the
result. If ad- bc is 0, report that The equation has no solution.
Enter a, b, c, d, e, f: 9.0, 4.0, 3.0, -5.0, -6.0, -21.0 Enter
x is -2.0 and y is 3.0
Enter a, b, c, d, e, f: 1.0, 2.0, 2.0, 4.0, 4.0, 5.0 Enter
The equation has no solution
(Financial: credit card number validation) Credit card numbers follow certain pat-
terns. A credit card number must have between 13 and 16 digits. It must start with:
4 for Visa cards
5 for Master cards
37 for American Express cards
6 for Discover cards
In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card
numbers. The algorithm is useful to determine whether a card number is entered
correctly or whether a credit card is scanned correctly by a scanner. Credit card
numbers are generated following this validity check, commonly known as the
Luhn check or the Mod 10 check, which can be described as follows (for illustra-
tion, consider the card number 4388576018402626):
1. Double every second digit from right to left. If doubling of a digit results in a
two-digit number, add up the two digits to get a single-digit number.
4388576018402626
→ 2 * 2 = 4
→ 2 * 2 = 4
→ 4 * 2 = 8
→ 1 * 2 = 2
6 * 2 = 12 (1+ 2 = 3)
→ 5 * 2 = 10 (1+ 0 = 1)
→ 8 * 2 = 16 (1 + 6 = 7)
→ 4 * 2 = 8
Chapter 4 Solutions
Introduction to Programming with C++
Ch. 4 - Prob. 1CPCh. 4 - Prob. 2CPCh. 4 - Write a statement that converts 47 degrees to...Ch. 4 - Write a statement that converts /7 to an angle in...Ch. 4 - Use console print statements to determine the...Ch. 4 - Prob. 6CPCh. 4 - How do you display the characters \ and "?Ch. 4 - Show the printout of the following code:...Ch. 4 - Prob. 9CPCh. 4 - Prob. 10CP
Ch. 4 - If the input for a starting character and an...Ch. 4 - If you run Listing 4.4 GuessBirthday.cpp with...Ch. 4 - Which function do you use to test whether a...Ch. 4 - Which function do you use to convert a letter to...Ch. 4 - Prob. 15CPCh. 4 - Prob. 16CPCh. 4 - Prob. 17CPCh. 4 - Prob. 18CPCh. 4 - Write a statement that changes the first character...Ch. 4 - Show the output of the following code:...Ch. 4 - Prob. 21CPCh. 4 - To use stream manipulators, which header file must...Ch. 4 - Show the output of the following statements....Ch. 4 - Show the output of the following statements:...Ch. 4 - Show the output of the following statements;...Ch. 4 - Show the output of the following statements:...Ch. 4 - Prob. 27CPCh. 4 - How do you create an object for reading data from...Ch. 4 - Prob. 29CPCh. 4 - What happens if the file already exists when you...Ch. 4 - (Geometry: area of a pentagon) Write a program...Ch. 4 - (Geometry: great circle distance) The great circle...Ch. 4 - (Geography: estimate areas) Find the GPS locations...Ch. 4 - (Geometry: area of a hexagon) The area of a...Ch. 4 - Prob. 5PECh. 4 - (Random point on a circle) Write a program that...Ch. 4 - Prob. 7PECh. 4 - (Find the character of an ASCII code) Write a...Ch. 4 - Prob. 9PECh. 4 - (Vowel or consonant?) Assume letters...Ch. 4 - Prob. 11PECh. 4 - (Convert letter grade to number) Write a program...Ch. 4 - (Hex to binary) Write a program that prompts the...Ch. 4 - Prob. 14PECh. 4 - (Phone key pads) The international standard...Ch. 4 - Prob. 16PECh. 4 - Prob. 17PECh. 4 - Prob. 18PECh. 4 - (Order three cities) Write a program that prompts...Ch. 4 - Prob. 20PECh. 4 - (Student major and status) Write a program that...Ch. 4 - Prob. 22PECh. 4 - (Check SSN) Write a program that prompts the user...
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