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 13CP
Which function do you use to test whether a character is a digit? a letter? a lower-case letter? an uppercase letter? a digit or a letter?
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It depends on what function you're looking for. Is this a letter or something? Is it a lower case letter? Is this a capital letter? How do you spell that?
Which function do you use to test whether a character is a digit? a letter? a lower-case letter? an uppercase letter? a digit or a letter?
Have you ever had the experience, while creating an account on a website, that a little meter pops up to tell you how "strong" your password is?
Let's create our own version of that meter. Complete the function password_strength, that takes one argument, password, which is a string
of characters consisting of lowercase letters, uppercase letters, digits and non-alphanumerical symbols. The function allocates points to the
password based on the location of certain characters in the string. The total at the end is a "score" that measures how strong the password is.
Remember that you can use int() to convert a digit character into actual integer value.
Points to Add
+40
+30
+20 for each such digit
+25 for each such digit
+5 for each such lowercase letter
+15 (in addition to the +5 from the previous rule)
Rule
the leftmost character is one of the symbols !, e, #, or $
the leftmost character is a digit
an even digit anywhere but the leftmost position
an odd digit anywhere but the leftmost…
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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