Concept explainers
(Invoice Class) Create a class called Invoice that a hardware store might use to represent an invoice for an item sold at the store. An Invoice should include four data members—a part num- (type string), a part description (type string), a quantity of the item being purchased (type int) and a price per item (type int). Your class should have a constructor that initializes the four data members. Provide a set and a get function for each data member. In addition, provide a member function named get lnvoice Amount that calculates the invoice amount (i.e., multiplies the quantity by the price per item), then returns the amount as an int value. If the quantity is not positive, it should be set to 0. If the price per item is not positive, it should be set to 0. Write a test
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- la) What are classes and objects? What is the difference between them? lb) What is the purpose of a constructor in a class?arrow_forwardPersonal Information ProgramDevelop a program, in which you’ll design a class that holds the following personal data: name, address, age, and phone number. As part of the program, you’ll then create appropriate accessor and mutator methods. Also, set up three instances of the class. One instance should hold your information, and the other two should hold your friends’ or family members’ information.Input: data for the following attributes of 3 instances of the Personal Information Class: name, address, age, and phone number NOTE: The input data do not need to be real data; they need to be entered at the keyboard, when program is run.Processing: Develop the following: Personal Information Class A program that creates three instances of the above class Output:Set up a loop and display data within each object: name, address, age, and phone numberarrow_forward5 (The Time class) Design a class named Time. The class contains: ■ Data fields hour, minute, and second that represent a time. ■ A no-arg constructor that creates a Time object for the current time. ■ A constructor that constructs a Time object with a specified elapse time since the middle of night, Jan 1, 1970, in seconds. ■ A constructor that constructs a Time object with the specified hour, minute, and second. ■ Three get functions for the data fields hour, minute, and second. ■ A function named setTime(int elapseTime) that sets a new time for the object using the elapsed time. Draw the UML diagram for the class. Implement the class. Write a test program that creates two Time objects, one using a no-arg constructor and the other using Time (555550), and display their hour, minute, and second. (Hint: The first two constructors will extract hour, minute, and second from the elapse time. For example, if the elapse time is 555550 seconds, the hour is 10, the minute is 19, and the…arrow_forward
- Account Class) Create an Account class that a bank might use to represent customers’ bank accounts. Include a data member of type intto represent the account balance. Provide a constructor that receives an initial balance and uses it to initialize the data member. Theconstructor should validate the initial balance to ensure that it’s greater than or equal to 0. If not, set the balance to 0 and display anerror message indicating that the initial balance was invalid. Provide three member functions. Member function credit should add anamount to the current balance. Member function debit should withdraw money from the Account and ensure that the debit amountdoes not exceed the Account’s balance. If it does, the balance should be left unchanged and the function should print a messageindicating "Debit amount exceeded account balance." Member function getBalance should return the current balance. Create a programthat creates two Account objects and tests the member functions…arrow_forwardTrue or False: 1. Data items in a class may be public. 2. Class members are public by default. 3. Friend functions have access only to public members of the class.arrow_forward7)Circle Class Write a Circle class that has the following fields: radius: a double PI:a final double initialized with the value 3.14159 The class should have the following methods: Constructor. Accepts the radius of the circles as an argument. Constructor. A no-arg constructor that sets the radius field to 0.0. setRadius. A mutator method for the radius field. getRadius.An accessor method for the radius field. area. Returns the area of the circle, which is calculated as area. Returns the area of the circles, which is calculated as area= PI * radius * radius diameter. Returns the diameter of the cirlce, which is calculated as diameter = radius * 2 circumference. Returns the circumference of the circle, which is calculated as circumference = 2 * PI * radius Write a program that demonstrates the Circle class by asking the user for the circles's radius, creating a Circle object, and then reporting the cirlce's area, diameter, and circumference.arrow_forward
- I Need help with this: Personal information class: Design a class that holds the following personal data:name, address, age, and phone number. Write appropriate accessor and mutator functions. Demonstrate the class by writing a program that creates three instances of it. One instance should hold your information, and the other two should hold yout friends’ or family members’ information.arrow_forwardEmployee Class (Medium) Write a class in C++ named Employee that has the following member variables: name. A string that holds the employee’s name. idNumber. An int variable that holds the employee’s ID number. department. A string that holds the name of the department where the employee works. position. A string that holds the employee’s job title. The class should have the following constructors: A constructor that accepts the following values as arguments and assigns them to the appropriate member variables: employee’s name, employee’s ID number, department, and position. A constructor that accepts the following values as arguments and assigns them to the appropriate member variables: employee’s name and ID number. The department and position fields should be assigned an empty string (""). A default constructor that assigns empty strings ("") to the name, department, and position member variables, and 0 to the idNumber member variable. Write appropriate mutator functions…arrow_forwardC++ Personal Information Class: Design a class that holds the following personal data: name, age, and phone number. Write appropriate accessor and mutator functions. Demonstrate the class by writing a program that creates three instances of it. One instance should hold your information, and the other two should hold your friend's or family member's information.arrow_forward
- Q2) write a class that represents a cube, which has the following: 1- Three variables : side, volume, area 2- One constructor function to input data of side 3- One function to find the volume of the cube 4- One destructor to print the area and volume of the cubearrow_forward2) Create an Account class that a bank might use to represent customers bank accounts. Include a data member of type int to represent the account balance. Provide a constructor that receives an initial balance and uses it to initialize the data member. The constructor should validate the initial balance to ensure that it’s greater than or equal to 0. If not ,set the balance to 0 and display an error message indicating that the initial balance was invalid. Provide three member functions. Member function credit should add an amount to the current balance. Member function debit should withdraw money from the Account and ensure that the debit amount does not exceed the Account’s balance. If it does, the balance should be left unchanged and the function should print a message indicating "Debit amount exceeded account balance." Member function get Balance should return the current balance. Create a program that creates two Account objects and tests the member functions of class Account.…arrow_forwardTrue or False It is legal to write a class without any constructors.arrow_forward
- Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,