PROBLEM I: Have you ever wondered how websites validate your credit card number when you shop online? They do not check a large database of numbers. Most credit providers rely on a checksum formula for distinguishing valid numbers from random collections of digits (or typing mistakes). The objective of this lab you will implement a program that read a file that contains a table with two columns: A column of customer names and a column of credit card numbers. For each customer, print the validity of the credit card number and name of the corresponding credit card company (if the number is valid) For our purpose, the algorithm that valid credit cards is the following: Double the value of every second digit beginning from the right. That is, the last digit is unchanged; the second-to-last digit is doubled; the third-to-last digit is unchanged; and so on. For example, [1,3,8,6] becomes [2,3,16,6] Add the digits of the doubled values and the undoubled digits from the original number. For example, [2,3,16,6] becomes 2+3+H6- Calculate the remainder when the sum is divided by 10. For the above example, the remainder 27 %10 would be vight. If the result equals zero, then the number is valid. 27 %3D Seven You can use the information below to map the name of a credit card company to a valid credit card number. Credit card brand Bank identification number prefix Credit card number length American Express Diners Club Carte Blanche 3437 300-305 15 14 Diners Club International 36 14 Diners Club US and 54 55 16 Canada 6011 622126-622925 644-649 65 Discover Card InstaPayment JCB 16 637-639 16 3528-3589 16 6304 6706 6771 6709 5018 5020 5038 6304|6759|6761|6762|6763 12-19 51-55 Laser 16-19 Maestro 16 Mastercard Visa Visa Electron 4. 13|16 4026 417500 4508|4844|4913|4917 16 For this lab, the student is responsible for generating the data needed to test their program.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Transcribed Image Text:PROBLEM I: Have you ever wondered how websites validate your credit card number when you shop online? They do not check a large database of numbers. Most credit providers rely on a checksum formula for distinguishing valid numbers from random collections of digits (or typing mistakes). The objective of this lab you will implement a program that read a file that contains a table with two columns: A column of customer names and a column of credit card numbers. For each customer, print the validity of the credit card number and name of the corresponding credit card company (if the number is valid), For our purpose, the algorithm that valid credit cards is the following: Double the value of every second digit beginning from the right. That is, the last digit is unchanged; the second-to-last digit is doubled; the third-to-last digit is unchanged; and so on. For example, [1,3,8,6] becomes [2,3,16,6] Add the digits of the doubled values and the undoubled digits from the original number. For example, [2,3,16,6] becomes 2+3++63D 27 Calculate the remainder when the sum is divided by 10. For the above example, the remainder 27 %10 would be eight. If the result equals zero, then the number is valid. seven You can use the information below to map the name of a credit card company to a valid credit card number. Credit card brand Bank identification number prefix Credit card number length American Express Diners Club Carte Blanche Diners Club International 34 37 15 300-305 14 36 14 Diners Club US and Canada 54|55 16 Discover Card InstaPayment JCB 6011 622126-622925|644-649|65 637-639 16 16 3528-3589 16 Laser 6304 6706|6771|6709 16-19 Maestro Mastercard Visa Visa Electron 51-55 4. 4026/417500 4508|4844|4913|4917 5018 5020 5038 6304|6759|6761|6762|6763 12-19 16 13|16 16 For this lab, the student is responsible for generating the data needed to test their program.

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