Inheritance is a mechanismin which one class acquires the property of an other class.For example, a child inherits the traits of his/her parents.(a)Understand the program code below in Figure 1 and answer thefollowing questions.class shape {protected int length, width;void set (int a, int b) {lengthwidth = b; }void show ()= a;{System.out.println (length+" "+width); }}class rectangle extends shape {int area;void setArea () {area= length*width;}void show (){ System.out.println (area); }}class AreaRec{public static void main (String [] args){ rectangle r= new rectangle () ;r. Set (4,10);r. Show () ;r. SetArea () ;r. Show () ; }}Figure 1: Rectangle areai.Identify the output of the program above. Please show thetracing table.

let dry run Code by Comment class Shape{ protected int length, width; void set (int a, int b)…

Inheritance is a mechanismin which one class acquires the property of an other class. For example, a child inherits the traits of his/her parents. Understand the program code below in Figure 1 and answer the (a) following questions. class shape { protected int length, width; void set (int a, int b) { length = a; width = b; } void show () { System.out.println (length+" "+width); }} class rectangle extends shape { int area; void setArea () { area= length*width;} void show () { System.out.println (area); }} class AreaRec{ public static void main (String [] args) { rectangle r= new rectangle () ; r. Set (4,10) ; r. Show () ; r. SetArea (); r.Show () ;}} Figure 1: Rectangle area i. tracing table. Identify the output of the program above. Please show the

Inheritance is a mechanismin which one class acquires the property of an other class. For example, a child inherits the traits of his/her parents. Understand the program code below in Figure 1 and answer the (a) following questions. class shape { protected int length, width; void set (int a, int b) { length = a; width = b; } void show () { System.out.println (length+" "+width); }} class rectangle extends shape { int area; void setArea () { area= length*width;} void show () { System.out.println (area); }} class AreaRec{ public static void main (String [] args) { rectangle r= new rectangle () ; r. Set (4,10) ; r. Show () ; r. SetArea (); r.Show () ;}} Figure 1: Rectangle area i. tracing table. Identify the output of the program above. Please show the

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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Consider the following class definition: (8) class base { public: void setXYZ(int a, int b, int c) ; voidsetX ( int a ) ; int getX ()const{returnx; } void setY ( int b ); intgetY()const{returny; } int mystryNum () {return ( x &*#x00A0;y - z &*#x00A0;z) ;} void print () const; base () } base(int a, int b, int c); protected: void setz ( int c) { z= c; } void secret(); int z= 0; private: int x= 0; int y = 0; }; a. Which member functions of the class base are protected? b. Which member functions of the class base are inline? c. Write the statements that derive the class myclass from class base as a public inheritance. d. Determine which members of class base are private, protected, and public in class myclass.
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Statement that increases numPeople by 5. Ex: If numPeople is initially 10, the output is: There are 15 people.
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Fibonacci A fibonacci sequence is a series of numbers in which each number is the sum of the two preceding numbers. For example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on… For this, you will implement a class that takes a positive integer (n) and returns the number in the nth position in the sequence. Examples When n is 1, the returned value will be 0. When n is 4, the returned value will be 2. When n is 9, the returned value will be 21. come up with the formula and base cases Implementation Create a class Fibonacci with a public static method getValue. Create a Main class to test and run your Fibonacci class.
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interface StudentsADT{void admissions();void discharge();void transfers(); }public class Course{String cname;int cno;int credits;public Course(){System.out.println("\nDEFAULT constructor called");}public Course(String c){System.out.println("\noverloaded constructor called");cname=c;}public Course(Course ch){System.out.println("\nCopy constructor called");cname=ch;}void setCourseName(String ch){cname=ch;System.out.println("\n"+cname);}void setSelectionNumber(int cno1){cno=cno1;System.out.println("\n"+cno);}void setNumberOfCredits(int cdit){credits=cdit;System.out.println("\n"+credits);}void setLink(){System.out.println("\nset link");}String getCourseName(){System.out.println("\n"+cname);}int getSelectionNumber(){System.out.println("\n"+cno);}int getNumberOfCredits(){System.out.println("\n"+credits); }void getLink(){System.out.println("\ninside get link");}} public class Students{String sname;int cno;int credits;int maxno;public Students(){System.out.println("\nDEFAULT constructor…
class implementation file -- Rectangle.cpp class Rectangle { #include #include "Rectangle.h" using namespace std; private: double width; double length; public: void setWidth (double); void setLength (double) ; double getWidth() const; double getLength() const; double getArea () const; } ; // set the width of the rectangle void Rectangle::setWidth (double w) { width = w; } // set the length of the rectangle void Rectangle::setLength (double l) { length l; //get the width of the rectangle double Rectangle::getWidth() const { return width; // more member functions here
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