Given a class Čircle as below: class Circle{ private int radius; double center_x; double center_y; Circle(){ .//some code here Circle(double x, double y, int radius){ .//some code here int getRadius(){ return radius; }; Which of the following line is incorrect? Circle myCircle = new Circle(10,20, 5); //~~~~~line A System.out.printin("radius is: "+myCircle.radius); //-~~~~line B Circle yourCircle = new Circle(); //-~~~line C System.out.println("radius is: "+yourCircle.getRadius(); //-~~~~line D

Given a class Čircle as below: class Circle{ private int radius; double center_x; double center_y; Circle(){ .//some code here Circle(double x, double y, int radius){ .//some code here int getRadius(){ return radius; }; Which of the following line is incorrect? Circle myCircle = new Circle(10,20, 5); //~~~line A System.out.printin("radius is: "+myCircle.radius); //-line B Circle yourCircle = new Circle(); //-~line C System.out.println("radius is: "+yourCircle.getRadius(); //-~~~~line D

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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In C++ class rectangleType { public: void setLengthWidth(double x, double y); //Sets the length = x; width = y; void print() const; //Output length and width double area(); //Calculate and return the area of the rectangle (length*width) double perimeter(); //Calculate and return the perimeter (length of outside boundary of the rectangle) private: double length; double width; }; Declare an instance of rectangleType.
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public class Stadium extends baseStadium{ public int typeTicket; int floors; int seating; String type; public float ticketPrice; public String leagueName=""; public void SetTecketName(String val) { leagueName=val; } public void setType() { if (typeTicket == 1) { type = "VIP"; } else { type = "Regular"; } } public String getType() { return type; } public void setPrice() { if (typeTicket == 1) { ticketPrice = 250; } else { ticketPrice = 100; } } public void setFloors(int floors) { this.floors = floors; } public int getFloors() { return floors; } public void setSeating(int seating) { this.seating = seating; } public int getSeating() { return seating; } public void printDetails() { System.out.println("Ticket Details:"); System.out.println("Ticket Type:…
class TenNums {private: int *p; public: TenNums() { p = new int[10];   for (int i = 0; i < 10; i++) p[i] = i;   } void display() { for (int i = 0; i < 10; i++) cout << p[i] << " "; }};int main() { TenNums a;    a.display();    TenNums b = a;    b.display();    return 0;} Write a copy constructor for the above class TenNums. Make sure it performs deep copy. Group of answer choices TenNums(const TenNums& b) { p = b.p;} TenNums(const TenNums& b) { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = b.p[i];} TenNums(const TenNums b) { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = b.p[i];} TenNums(const TenNums b) { p = b.p;}
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Part 1 is already done and here it is public class Point {                  protected double x;         protected double y;                  public Point() {                          }         public Point(double x, double y) {                 this.x = x;                 this.y = y;         }         public double getX() {                 return x;         }         public double getY() {                 return y;         }         public void setPoint(Point X){                 x = X.x;                 y = X.y;         }                  void makeCopy(Point x){                 setPoint(x);         }                  Point getCopy(){                 return this;         }                  public void printPoint(){                 System.out.println("["+this.x+", "+this.y+"]");         }                  @Override         public String toString() {                 return "x-Coordinate is " + x + "and y-coordinate is " + y;         }         public boolean equals(Point X) {…
26. Assume the declaration of Exercise 24. A. Write the statements that derive the class dummyClass from class base as a private inheritance. (2 lines are { and }.) "A1 is { "A2 is "A3 is )) B. Determine which members of class base are private, protected, and public in class dummyClass. "B1 is dummyClass is a de
package assignment; public class Circle2D2 { //data fields specifying the center of the circle private double x, y; //data field radius private double radius; //default circle with (0, 0) for (x, y) and 1 for radius Circle2D2() { this(0, 0, 1); } //circle with the specified x, y, and radius Circle2D2(double x, double y, double radius) { this.x = x; this.y = y; this.radius = radius; } //return x public double getX() { return x; } //return y public double getY() { return y; } //return radius public double getRadius() { return radius; } //return the area of the circle public double getArea() { return Math.PI * Math.pow(radius, 2); } //return the perimeter of the circle public double getPerimeter() { return 2 * Math.PI * radius; } //return true if the specified point (x, y) is inside this circle public boolean contains(double x, double y) { return Math.sqrt(Math.pow(x - this.x, 2) + Math.pow(y - this.y, 2)) < radius; } //return true if…
Consider the following code segment and answer questions 14 and 15. class Point { public: Point (double x = -99, double y = -99) { this -> xM = x; this -> yM = y;} double getx () {return xM; } double gety () {return yM; } void setx (double x) {this -> xM = x; } void sety (double y) {this -> yM = y; } private: double xM, yM; }; 14. What is the output of the following code snippet: Point pl (100); cout << pl.getx() << " " << pl.gety(); a. The output of the program is: -99 -99 b. The output of the program is: 100 100 c. The output of the program is: -99 100 d. The output of the program is: 100 -99 e. None of the above. It doesn't compile because constructor of Point needs two arguments. 15. How many times does the constructor of class Point get called by the following code snippet: Point a (100, 200); Point b[6]; Point *c = new Point; Point *d = new Point (300, 400); a. Four times b. Three times c. Nine times d. Two times e. None of the above