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// Assignment #:4 // Name: // StudentID: // Lecture: // Description: Assignment 4 class displays a menu of choices to a user // and performs the chosen task. It will keep asking a user to // enter the next choice until the choice of 'Q' (Quit) is entered. import java.io.*; import java.util.*; public class Assignment4 { public static void main (String[] args) { // local variables, can be accessed anywhere from the main method char input1 = 'Z'; String inputInfo; String bookTitle; String bookPublisher; double rating; String line = new String(); // instantiate a Book object Book book1 = new Book(); printMenu(); //Create a Scanner object to read user input Scanner scan = new Scanner(System.in); do // will ask for user input { System.out.println("What action would you like to perform?"); line = scan.nextLine(); if (line.length() == 1) { input1 = line.charAt(0); input1 = Character.toUpperCase(input1); // matches one of the case statement switch (input1) { case 'A': //Add Book book1 = new Book(); System.out.print("Please enter the book information:\n"); System.out.print("Enter a book title:\n"); bookTitle = scan.nextLine(); book1.setTitle(bookTitle); System.out.print("Enter its publisher:\n"); bookPublisher = scan.nextLine(); book1.setPublisher(bookPublisher); break; case 'D': //Display Book System.out.print(book1); break; case 'Q': //Quit break; case 'R': //Add Rating System.out.print("Please give a rating of the book:\n"); rating = Double.parseDouble(scan.nextLine()); book1.addRating(rating); break; case '?': //Display Menu printMenu(); break; default: System.out.print("Unknown action\n"); break; } } else { System.out.print("Unknown action\n"); } } while (input1 != 'Q' || line.length() != 1); } /** The method printMenu displays the menu to a user**/ public static void printMenu() { System.out.print("Choice\t\tAction\n" + "------\t\t------\n" + "A\t\tAdd Book\n" + "D\t\tDisplay Book\n" + "Q\t\tQuit\n" + "R\t\tGive Rating\n" + "?\t\tDisplay Help\n\n"); } }

demo | 101 | demo | assessment | // Assignment #:4 // Name: // 

// File: Mystery.java public class Mystery { private int[] x; private int n; //constructor public Mystery() { x = new int[10]; x[0] = 15; x[1] = 5; x[2] = 4; x[3] = 10; x[4] = 7; x[5] = 2; n = 6; } // reverses the array public void rearrange( ) { int first = 0; int last = n - 1; while( first < last ) { System.out.println ( first + " " + last ); int temp = x[first]; x[first] = x[last]; x[last] = temp; first++; last--; } } // This method returns the index where searchingNum is located. // It returns -1 if it is not found. public int indexOf(int searchingNum) { for (int i = 0; i < n; i++) { if (x[i] == searchingNum) return i; } return -1; } public String toString( ) { String result = "{ "; for( int j = 0; j < n; j++ ) result += x[j] + " "; return result += "}"; } }

demo | 101 | demo | assessment | // File: Mystery.java public c

Assignment #2 CSE110 - Arizona State University Topics • To declare and use variables • Arithmetic Expressions • Using the Scanner class to get the input from the user • Use selection statements to ﬁnd a maximum value Coding Guidelines: • Give identiﬁers semantic meaning and make them easy to read (examples numStudents, grossPay, etc). • Keep identiﬁers to a reasonably short length. • User upper case for constants. Use title case (ﬁrst letter is upper case) for classes. Use lower case with uppercase word separators for all other identiﬁers (variables, methods, objects). • Use tabs or spaces to indent code within blocks (code surrounded by braces). This includes classes, methods, and code associated with ifs, switches and loops. Be consistent with the number of spaces or tabs that you use to indent. • Use white space to make your program more readable. Important Note All submitted assignments must begin with the descriptive comment block. To avoid losing trivial points, make sure this comment header is included in every assignment you submit, and that it is updated accordingly from assignment to assignment. Reasonably good amount of comments should be added in your program so that it is easy for other people to understand it. Please see the comment style in the textbook. Part #1: Written Exercises (5 pts) 1. (2 pts.) What do the following expressions evaluate to in Java given int x = 3, y = 6; a) x == y / 2 b) x % 2 == 0 || y % 2 != 0 c) x - y < 0 && !(x >= y) d) x + 6 != y || x / y <= 0 2. (1 pt.) Write statements to prompt for and read the user?s full name using a Scanner variable. 3. (2 pts.) What does the following statement sequence print? (page 63) String str = "Harry"; int n = str.length(); String mystery = str.substring(0,1) + str.substring(n-1, n); System.out.println(mystery); 1 Part #2 - Programming (15 pts) Overview Write a complete Java program in a source ﬁle to be named Assignment2.java . The program prints out the following menu to a user, using ’\t’ (tabs) and ’\n’ (newline), and print or println methods of System.out : Welcome to the In-N-Out Burger menu: ------------------------------------------------------ Hamburger $2.75 Cheeseburger $3.25 French Fries $2.50 Shake & Beverage: $1.50 Then prompts the user: How many hamburger(s) would you like to buy? and read in the number. Then prompts the user: How many cheeseburger(s) would you like to buy? and read in the number. Then prompts the user: How many French fries would you like to buy? and read in the number. Then prompts the user: How many drinks would you like to buy? and read in the number. Then the program computes and prints the following: • The total cost for the hamburger(s) • The total cost for the cheeseburger(s) • The total cost for fries • The total cost for drink(s) • Which item had the highest total cost • The total cost for the order • The total number of hamburgers, cheeseburgers, French fries, and drinks ordered Hint One way to ﬁnd which item has the highest total cost is to create a String variable to hold the name of that item and then use comparisons to check if the cost of hamburgers is greater than the other prices (using &&) then set the String to “hamburgers”. You would need a similar check to see if the other total costs are the largest. Then you could output the highest String when needed (see sample output below). To earn full points on this assignment you will have to: • Use constant doubles for price of a Hamburgers, Cheeseburger, French Fries and Drinks. 2

demo | 101 | demo | assessment | Assignment #2 CSE110 - Arizona

Assignment_6_Implementing_Employee_class.docx-AUTHOR: // FILENAME: Employee.java // SPECIFICATION:

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