Description
Description: The first Assignment lets you practice basic java coding techniques, creating classes, methods and using arrays. Task 1: The explosive growth of Internet communications and data storage on Internet-connected computers has greatly increased privacy concerns. The field of cryptography is concerned with coding data to make it difficult (and hopefully—with the most advanced schemes—impossible) for unauthorized users to read. In this exercise you’ll investigate a simple scheme for encrypting and decrypting data. A company that wants to send data over the Internet has asked you to write a program that will encrypt it so that it may be transmitted more securely. All the data is transmitted as four-digit integers. Your application should read a four-digit integer entered by the user and encrypt it as follows: • Replace each digit with the result of adding 7 to the digit and getting the remainder after dividing the new value by 10. • Then swap the first digit with the third and swap the second digit with the fourth. • Then print the encrypted integer. Write a separate application that inputs an encrypted four-digit integer and decrypts it (by reversing the encryption scheme) to form the original number. [Optional reading project: Research “public key cryptography” in general and the PGP (Pretty Good Privacy) specific public key scheme. You may also want to investigate the RSA scheme, which is widely used in industrial-strength applications.] Task 2: This task is required to create Craps, which is a popular dice game played in casinos. You are supposed to write a program to play a variation of the game, as follows: • Roll two dice. (Each roll should produce two random numbers between 1 to 6) • Each die has six faces representing values 1, 2, …, and 6, respectively. • Check the sum of the two dice. If the sum is 2, 3, or 12 (your program should display craps), you lose the game. JAC – 444 Semester 2021 • If the sum of the two dice is 7 or 11 (your program should display naturals), you win the game. • If the sum of two dice is any value (i.e., 4, 5, 6, 8, 9, or 10), your program should establish a point in the game (meaning store that sum). Continue to roll the dice until the sum is either a 7 or the same point value which was established. If rolled sum is 7, you lose the game. Otherwise, if the rolled sum is equal to established point you win. Your program acts as a single player. Task 3: (Modification of Craps) Modify the craps program from above to allow wagering. • Initialize variable bankBalance to 1000 dollars. • Prompt the player to enter a wager. • Check that wager is less than or equal to bankBalance, and if it’s not, have the user reenter wager until a valid wager is entered. • Then, run one game of craps. • If the player wins, increase bankBalance by wager and display the new bank- • Balance. • If the player loses, decrease bankBalance by wager, display the new bank-Balance, check whether bankBalance has become zero and, if so, display the message “Sorry. You busted!” • As the game progresses, display various messages to create some “chatter,” such as “Oh, you’re going for broke, huh?” or “Aw c’mon, take a chance!” or “You’re up big. Now’s the time to cash in your chips!”. • Implement the “chatter” as a separate method that randomly chooses the string to display. Continue to the next page… You rolled 5 + 6 = 11 Congratulations, You win You rolled 1 + 2 = 3 Craps, Better Luck Next Time, You lose You rolled 4 + 4 = 8 Point is (established) set to 8 You rolled 5 + 1 = 6 You rolled 1 + 1 = 2 You rolled 6 + 2 = 8 Congratulations, You Win You rolled 5 + 1 = 6 Point is (established) set to 6 You rolled 2 + 5 = 7 Craps, Better Luck Next Time, You Lose JAC – 444 Semester 2021 Workshop Header /********************************************** Workshop # Course: – Semester Last Name: First Name: ID: Section:
