Microsoft Visual C#
7th Edition
ISBN: 9781337102100
Author: Joyce, Farrell.
Publisher: Cengage Learning,
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Textbook Question
Chapter 9, Problem 11E
a. Write a FractionDemo
• Create properties for each field. The set access or for the denominator should not allow a 0 value; the value defaults to 1.
• Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameterless; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.)
• Add a Reduce() method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2.
• Add an operator+() method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce() method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20.
• Include a function that returns a string that contains a Fraction in the usual display format—the whole number, a space, the numerator, a slash (D, and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should be displayed (for example, 2 instead of 2 0/3).
b. Add an operator*() method to the Fraction class created in Exercise 11a so that it correctly multiplies two Fractions. The result should be in proper, reduced format. Demonstrate that the method works correctly in a program named FractionDemo2.
c. Write a program named FractionDem03 that includes an array of four Fractions. Prompt the user for values for each. Display every possible combination of addition results and every possible combination of multiplication results for each Fraction pair (that is, each type will have 16 results).
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Define the Circle2D class that contains:
Two double data fields named x and y that specify the center of the circle with get methods.
A data field radius with a get method.
A no-arg constructor that creates a default circle with (0, 0) for (x, y) and 1 for radius.
A constructor that creates a circle with the specified x, y, and radius.
A method getArea() that returns the area of the circle.
A method getPerimeter() that returns the perimeter of the circle.
A method contains(double x, double y) that returns true if the specified point (x, y) is inside this circle. See Figure 10.14(a).
A method contains(Circle2D circle) that returns true if the specified circle is inside this circle. See Figure 10.14(b).
A method overlaps(Circle2D circle) that returns true if the specified circle overlaps with this circle. See the figure below.
Figure
(a) A point is inside the circle. (b) A circle is inside another circle. (c) A circle overlaps another circle.
Draw the UML diagram for the class.…
Create a class named Person.a. This class must have two variables to store name (string) and age (int). These variables should not be accessible from outside the class.b. Encapsulate the variables defined in item a with a property (an intermediate variable) so that they can be accessed from other classes. And after this step, use only intermediate variables that you defined for encapsulation within methods and other classes.c. Define a constructor method for this class. Code the constructor method to initialize the properties of the class at the time of object definition.D. Define a method called Print Info that will print the information of the class object on the screen in a proper format.
Can you call a constructor from another constructor? A solution is placed in the "solution" section to help you, but we would suggest you try to solve it on your own first.
Problem Statement#
A class can have multiple parameterized constructors which can call each other.
You are given a partially completed code of a Car class in the editor. Modify the parametrized constructor which assigns parameters to the required fields.
Input#
carName, carModel, carCapacity
Output#
carName, carModel, carCapacity
Sample Input#
"Ferrari", "F8", "100"
Sample Output#
"Ferrari", "F8", "100"
Part of solution
// Car class
class Car {
// Private Fields
private String carName;
private String carModel;
private String carCapacity;
// Default Constructor
public Car() {
this.carName = "";
this.carModel = "";
this.carCapacity = "";
}
// Parameterized Constructor 1
public Car(String name, String model) {
this.carName = name;
this.carModel = model;
}
// Parameterized Constructor 2
public…
Chapter 9 Solutions
Microsoft Visual C#
Ch. 9 - Assume that you have created a class named...Ch. 9 - Prob. 9RQCh. 9 - Assume that you have created a class named...Ch. 9 - Create an application named SalesTransactionDemo...Ch. 9 - Create an application named CarDemo that declares...Ch. 9 - Create a program named SalesTaxDemo that declares...Ch. 9 - Prob. 8ECh. 9 - Write a program named DemoJobs for Harolds Home...Ch. 9 - a. Write a FractionDemo program that instantiates...Ch. 9 - Prob. 1DE
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