C How To Program, Global Edition
8th Edition
ISBN: 9781292110974
Author: Paul Deitel, Harvey Deitel
Publisher: PEARSON
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Chapter 8, Problem 8.14E
(Tokenizing Telephone Numbers) Write a
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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
(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,…
(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 8 Solutions
C How To Program, Global Edition
Ch. 8 - (Character Testing) Write a program that inputs a...Ch. 8 - Prob. 8.6ECh. 8 - (Convening Strings to Integers for Calculations)...Ch. 8 - (Converting Strings to Floating Point for...Ch. 8 - Prob. 8.9ECh. 8 - Prob. 8.10ECh. 8 - (Random Sentences) Write a program that uses...Ch. 8 - (Pig Latin) Write a program that encodes...Ch. 8 - (Tokenizing Telephone Numbers) Write a program...Ch. 8 - (Displaying a Sentence with Its Words Reversed)...
Ch. 8 - (Searching for Substrings) Write a program that...Ch. 8 - (Counting the Occurrences of a Substring) Write a...Ch. 8 - (Counting the Occurrences of a Character) Write a...Ch. 8 - Prob. 8.19ECh. 8 - (Counting the Number of Words in a String) Write a...Ch. 8 - (Alphabetizing a List of Strings) Use the...Ch. 8 - Prob. 8.22ECh. 8 - (Strings Starting with b) Write a program that...Ch. 8 - (Strings Ending with ed) Write a program that...Ch. 8 - (Printing Letters for Various ASCII Codes) Write a...Ch. 8 - (Write Your Own Character-Handling Functions)...Ch. 8 - Prob. 8.27ECh. 8 - Prob. 8.28ECh. 8 - Prob. 8.29ECh. 8 - Prob. 8.30ECh. 8 - (Text Analysis) The availability of computers with...Ch. 8 - (Printing Dates in Various Formats) Dates are...Ch. 8 - (Check Protection) Computers are frequently used...Ch. 8 - (Writing the Word Equivalent of a Check Amount)...Ch. 8 - Prob. 8.35ASME
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- (DEBUG AND MAKE A FLOWCHART OF THIS PROGRAM) // This pseudocode is intended to display// employee net pay values. All employees have a standard// $45 deduction from their checks.// If an employee does not earn enough to cover the deduction,// an error message is displayed.// This example is modularized.start Declarations string name string EOFNAME = ZZZZ while name not equal to EOFNAME housekeeping() endwhile while name not equal to EOFNAME mainLoop() endwhile while name not equal to EOFNAME finish() endwhilestop housekeeping() output "Enter first name or ", EOFNAME, " to quit "return mainLoop() Declarations num hours num rate num DEDUCTION = 45 num net output "Enter hours worked for ", name input hours output "Enter hourly rate for ", name input rate gross = hours * rate net = gross - DEDUCTION if net > 0 then output "Net pay for ", name, " is ", net else output "Deductions not covered. Net is…arrow_forwardQ2) (Perfect Numbers) An integer number is said to be a perfect number if its factors, including 1 (but not the number itself), sum to the number. For example, 6 is a perfect number because 6 = 1 + 2 + 3. Write a function perfect that determines if parameter number is a perfect number. Use this function in a program that determines and prints all the perfect numbers between 1 and 1000. Print the factors of each perfect number to confirm that the number is indeed perfect. Challenge the power of your computer by testing numbers much larger than 1000.arrow_forward(java programming language) Write a Java program to do the following task: Assign your id number (example.. 2014299123) to an integer variable id_num Using reminder operator % on the id_num get the last 5 digits (99123) and store it in num If the num is between 0 and 30,000 (both included), display “You are in Group 1” Otherwise if the num is between 30001 and 60,000 (both included), display “You are in Group 2” Otherwise (num is between 60,001 and 99,999 (both included), display “You are in Group 3” Save your file as Q2.Javaarrow_forward
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