7.14: Chapter Exercises
- Page ID
- 136679
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Exercise 1: Vector Maker
Write a script named vectorMaker that uses a loop to prompt the user to enter elements of a vector one at a time. If the user enters any letter, the program stops and prints the vector. If the user never enters a number, display a helpful message.
Exercise 2: Whitespace Counter
Write a function named whitespaceCounter that receives a string scalar and returns the number of whitespace characters. Your function must use isstrprop.
Exercise 3: Guest List
Write a function named isGuest that receives a name and a string array containing a guest list. The function should return one logical value indicating whether the name appears on the list. The comparison should ignore case.
Exercise 4: Split a Date
Write a function named splitDate that receives a date in a format such as 07-Feb-2008 and returns the day, month, and year as separate output arguments.
Exercise 5: Assembly Operation
Write a function named assemblyOperation that receives a string in one of the following forms: "Add n,m", "Subtract n,m", "Divide n,m", or "Multiply n,m". The function should return the result of the requested operation.
Exercise 6: Hidden Message
In cryptography, the intended message may consist of the first letter of every word in a sentence. Write a function named crypt that receives a character vector and returns the hidden message formed from the first letter of each word.
Exercise 7: Delete Multiple Blanks
Write a function named deleteMultipleBlanks that receives a string containing a sentence with extra blank spaces between some words. Return the sentence with only one blank space between words.
Exercise 8: Sine Calculator
Write a script named sine.m that prompts the user to enter an angle followed by r for radians or d for degrees. The script should use sin for radians and sind for degrees, then display the result.
Exercise 9: Username Cleaner
Write a function that receives a user name as text, removes leading and trailing spaces, converts it to lowercase, and replaces internal spaces with underscores.
Exercise 10: Simple Password Checker
Write a function that receives a password as text and checks whether it contains at least one uppercase letter, one lowercase letter, and one digit. Use isstrprop to help with the checks.