Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
5th Edition
ISBN: 9780134801155
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 12, Problem 12PE

Password Weakness Detector

Design a program that asks the user to enter a password, and then analyzes the password for the following weaknesses:

  • Fewer than 8 characters
  • Does not contain at least one uppercase letter and one lowercase letter
  • Does not contain at least one numeric digit
  • Does not contain at least one special character (a character that is not a letter or a numeric digit)
  • Is a sequence of consecutive uppercase letters (such as ABCDE)
  • Is a sequence of consecutive lowercase letters (such as abcde)
  • Is a sequence of consecutive numeric digits (such as 12345)
  • Is a repeating sequence of characters (such as ZZZZZ or 55555)

The program should display messages indicating whether any of these weaknesses are found in the password.

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Barcode Validation As you are aware, barcodes encode numbers. In the Universal Product Code system, each item is assigned a globally unique number. But not every number is a valid UPC. Why? Part of the answer is the check digit. In order to catch errors, the rightmost digit is calculated from the others. If this digit does not match its expected value, you can be assured the barcode is invalid, or has been read incorrectly. To calculate the check digit, perform the following operations modulo 10: • Sum the digits in the odd positions and multiply the result by three. • Add the digits in the even positions to the result. • Subtract the result from 10 to obtain the check digit. Your Task Given a 12-digit UPC, you will need to identify whether is is valid or invalid. The code will be provided from standard input. You simply need to print "valid" or "invalid" in response. Notes The code will be provided on a line by itself, and will consist of numerals alone. You may assume that it will be…

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