Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Chapter 4.3, Problem 4.3.7CP
Write the code that generates a random lowercase letter.
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Credit Card Number CheckThe last digit of a credit card number is the check digitwhich protects against transcription errors such as an error in a single digit or switching two digits. The following method is used to verify actual credit card numbers but, for simplicity, we will describe it for numbers with 8 digits instead of 16: Starting from the rightmost digit, form the sum of every other digit. For example, if the credit card number is 4358 9795, then you form the sum 5 + 7 + 8 + 3 = 23 . Double each of the digits that were not included in the preceding step. Add all digits of the resulting numbers . For example, with the number given above, doubling the digits. starting with the next-to-last one, yields 18 18 10 8. Adding all digits in these values yields 1 + 8 + 1 + 8 + 1 + 0 + 8 = 27 Add the sums of the two preceding steps . If the last digit of the result is 0, the number is valid . In our case , 23 + 27 = 50 , so the number is valid . Write a program that implements this…
Chapter 4 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 4.2 - Evalute the following method calls: (a)...Ch. 4.2 - True or false? The argument for trigonometric...Ch. 4.2 - Write a statement that converts 47 degrees to...Ch. 4.2 - Write a statement that converts PI to an angle in...Ch. 4.2 - Write an expression that obtains a random integer...Ch. 4.2 - Prob. 4.2.6CPCh. 4.2 - Prob. 4.2.7CPCh. 4.3 - Use print statements to find out the ASCII code...Ch. 4.3 - Which of the following are correct literals for...Ch. 4.3 - How do you display the characters \ and "?
Ch. 4.3 - Evaluate the following: Int i = '1'; int j ='1' +...Ch. 4.3 - Can the following conversions involving casting be...Ch. 4.3 - Show the output of the following program: public...Ch. 4.3 - Write the code that generates a random lowercase...Ch. 4.3 - Show the output of the following statements:...Ch. 4.4 - Suppose s1, s2, and s3 are three strings, given as...Ch. 4.4 - Prob. 4.4.2CPCh. 4.4 - Show the output of the following statements (write...Ch. 4.4 - Prob. 4.4.4CPCh. 4.4 - Let s1 be " Welcome " and s2 be " welcome ". Write...Ch. 4.4 - Write one statement to return the number of digits...Ch. 4.4 - Write one statement to return the number of digits...Ch. 4.5 - If you run Listing 4.3 GuessBirthday.java with...Ch. 4.5 - If you enter a lowercase letter such as b, the...Ch. 4.5 - What would be wrong if lines 6 and 7 are in...Ch. 4.6 - Prob. 4.6.1CPCh. 4.6 - Prob. 4.6.2CPCh. 4.6 - Show the output of the following statements: (a)...Ch. 4 - (Geometry: area of a pentagon) Write a program...Ch. 4 - (Geometry: great circle distance) The great circle...Ch. 4 - (Geography: estimate areas) Use the GPS locations...Ch. 4 - (Geometry: area of a hexagon) The area of a...Ch. 4 - (Geometry: area of a regular polygon) A regular...Ch. 4 - (Random points on a circle) Write a program that...Ch. 4 - (Corner point coordinates) Suppose a pentagon is...Ch. 4 - (Find the character of an ASCII code) Write a...Ch. 4 - (Find the Unicode of a character) Write a program...Ch. 4 - (Guess birthday) Rewrite Listing 4.3,...Ch. 4 - (Decimal to hex) Write a program that prompts the...Ch. 4 - (Hex to binary) Write a program that prompts the...Ch. 4 - (Vowel or consonant?) Write a program that prompts...Ch. 4 - (Convert Letter grade to number) Write a program...Ch. 4 - (Phone key pads) The international standard...Ch. 4 - (Random character) Write a program that displays a...Ch. 4 - (Days of a month) Write a program that prompts the...Ch. 4 - (Student major and status) Write a program that...Ch. 4 - (Business: check ISBN-10) Rewrite Programming...Ch. 4 - (Process a string) Write a program that prompts...Ch. 4 - (Check SSN) Write a program that prompts the user...Ch. 4 - (Check substring) Write a program that prompts the...Ch. 4 - 23 (Financial application: payroll) Write a...Ch. 4 - (Order three cities) Write a program that prompts...Ch. 4 - (Generate vehicle plate numbers) Assume that a...Ch. 4 - (Financial application: monetary units) Rewrite...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128. Write a code to check whether a entered number is a perfect number or not.arrow_forwardWrite code using the in operator that determines whether 'd' is in mystring.arrow_forwardEnter three values of angles and then print "Triangle" or "Not a triangle" depending on whether these three angles can form a triangle or not. In addition, if it is a right angle triangle then print "Right-Angle Triangle" or "Non Right-Angle Triangle".arrow_forward
- String user_input is read from input. If user_input starts with 'G', then output 'String starts with G'. Otherwise, if all the characters in user_input are numbers, then output 'All numbers'. If none of the above are true, output 'No condition fits'.arrow_forwardWhich string method does the following: To capitalize the initial character of the string.arrow_forwardQ2: Write a program that inputs a five-digit integer, separates the integer into its individual digits and prints the digits separated from one another by three spaces each. For example, if the user types in 42339, the program should print:4 2 33 9.arrow_forward
- Please fix the code see picture for error. Thank youarrow_forwardInput code in the "Write code here" sectionsarrow_forwardUsing function strtod(), Create a character string that contains the following string: “78.3% is the average success rate” Divide this string into double and display the rest of the string The output will be: The original string is: 78.3% is the average success rate The extracted double value is: 78.3 The remainder of the string is: % is the average success ratearrow_forward
- plue circle around the y-int er 6. y=(3)/(2)x+3arrow_forwardPr.01. Add remain code and complete. number is a number whose sum total of the factorials of each digit is equal to thenumber itself. The following are some examples of Krishnamurthy numbers: "145" is a Krishnamurthy Number because,1! + 4! + 5! = 1 + 24 + 120 = 145 "40585" is also a Krishnamurthy Number.4! + 0! + 5! + 8! + 5! = 40585 "357" or "25965" is NOT a Krishnamurthy Number3! + 5! + 7! = 6 + 120 + 5040 != 357 The following function will check if a number is a Krishnamurthy Number or not and return aboolean value.""" def find_factorial(n): """ Calculates the factorial of a given number n """ fact = 1 while n != 0: fact *= n n -= 1 return fact def krishnamurthy_number(n): if n == 0: return False sum_of_digits = 0 # will hold sum of FACTORIAL of digits temp = n.arrow_forwardCredit Card Number Check. The last digit of a credit card number is the check digit, which protects against transcription errors such as an error in a single digit or switching two digits. The following method is used to verify actual credit card numbers but, for simplicity, we will describe it for numbers with 8 digits instead of 16:• Starting from the rightmost digit, form the sum of every other digit. For example, if thecredit card number is 4358 9795, then you form the sum 5 + 7 + 8 + 3 = 23.• Double each of the digits that were not included in the preceding step. Add all digits ofthe resulting numbers. For example, with the number given above, doubling the digits,starting with the next-to-last one, yields 18 18 10 8. Adding all digits in these valuesyields 1 + 8 + 1 + 8 + 1 + 0 + 8 = 27.• Add the sums of the two preceding steps. If the last digit of the result is 0, the number isvalid. In our case, 23 + 27 = 50, so the number is valid.Write a program that implements this…arrow_forward
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