The CashRegister class we saw is stored on Moodle. Copy it and make the following change: Reimplement the class as CashRegister2, so that it keeps track of the price of each added item in a data member vector itemPrices. Remove the item_count and the total_price data members (no longer needed). Reimplement the constructor, clear, add_item, get_count and get_total functions. Add a member function: void display_all();

The CashRegister class we saw is stored on Moodle. Copy it and make the following change: Reimplement the class as CashRegister2, so that it keeps track of the price of each added item in a data member vector itemPrices. Remove the item_count and the total_price data members (no longer needed). Reimplement the constructor, clear, add_item, get_count and get_total functions. Add a member function: void display_all();

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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Goal 1: Update the Fractions Class Reduce fractions (i.e. 15/18 SHOULD be reduced to 5/6), Add the "const" keyword to our member functions. Update Member Functions: The parameterized constructor should check to make sure that the second parameter is not a 0 by using the statement assert(denominatorParameter != 0); assert() is not the best way to handle this, but it will have to do until we study exception handling. Add the const keyword to your methods wherever appropriate and also make sure to pass objects by reference. Your class may still work correctly even if you don't do this correctly, so this will require extra care! Add a private "simplify()" function to your class, which will reduce your fraction (for example, 15/18 becomes 5/6). Following is an algorithm that you may use for your simplify() function. algorithm: finds the greatest common factor of numerator and denominator andthen divides both numerator and denominator by the result. The greatestcommon factor is found…
Create a player class and a Key class. A Player hasa name, HP, and a key. A character may only have one key at a time, a Key contains a String array that lists the names of all the placed the key can go. The key should have a use() function that takes in a string of what it is trying to be used on, the function will return true if it can be used on that door, and false if it cannot. The player can pick Up and Drop a key.
Task 1:The first task is to make the maze. A class is created called Maze, in which a 2D array for the maze is declared. Your job is to implement the constructor according to the given javaDoc. When you completed this task, write a set of Junit test case to test your code.As you probably noticed, the maze is defined as a private variable. The second job for you is to write an accessor(getter) method that returns the maze. Other information about what is expected for this method is given in the starter code. public class PE1 { MazedogMaze; /** * This method sets up the maze using the given input argument * @param maze is a maze that is used to construct the dogMaze */ publicvoidsetup(String[][]maze){ /* insert your code here to create the dogMaze * using the input argument. */ }
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(1) Extend the ItemToPurchase class to contain a new attribute. item_description (string) - Set to "none" in default constructor Implement the following method for the ItemToPurchase class. print_item_description() - Prints item_description attribute for an ItemToPurchase object. Has an ItemToPurchase parameter. Ex. of print_item_description() output: Bottled Water: Deer Park, 12 oz. (2) Build the ShoppingCart class with the following data attributes and related methods. Note: Some can be method stubs (empty methods) initially, to be completed in later steps. Parameterized constructor which takes the customer name and date as parameters Attributes customer_name (string) - Initialized in default constructor to "none" current_date (string) - Initialized in default constructor to "January 1, 2016" cart_items (list) Methods add_item() Adds an item to cart_items list. Has parameter ItemToPurchase. Does not return anything. remove_item() Removes item from cart_items list.…
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