What does the following program do? Explain why. [***This is the NEW question) #include class A { public: void f() { std::cout << "A"; } } ; class B : public A { public: void f() { std::cout << "B"; } } ; void g(A &a) { a.f(); }| int main(O { B b; g (b) ; }

What does the following program do? Explain why. [***This is the NEW question) #include class A { public: void f() { std::cout << "A"; } } ; class B : public A { public: void f() { std::cout << "B"; } } ; void g(A &a) { a.f(); }| int main(O { B b; g (b) ; }

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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Q2: Consider the following statements: public class YClass { private int a; private int b; public void one() { } public void two(int x, int y); { } public YClass() { } } class XClass extends YClass { private int z; public void one() { } public XClass() { } } YClass yObject; XClass xObject; Write the definition of the default constructor of YClass so that the instance variables of YClass are initialized to 0. Write the definition of the default constructor of XClass so that the instance variables of XClass are initialized to 0. Write the definition of the method two of YClass so that the instance variable a is initialized to the value of the first parameter of two and the instance variable b is initialized to the value of the second parameter of two. please I want solution :(
Use the following partial class definitions to answer the questions a-c public class A1 { public int x; private int y; protected int z; ... } public class A2 extends A1 { protected int a; private int b; ... } public class A3 extends A2 { private int q; ... } a) Which of the following is true with respect to A1, A2 and A3? Group of answer choices A1 is a subclass of A2 and A2 is a subclass of A3 A3 is a subclass of A2 and A2 is a subclass of A1 A1 and A2 are both subclasses of A3 A2 and A3 are both subclasses of A1 A1, A2 and A3 are all…
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use python Implement the design of the Doctor and Engineer class derived from Person class so that the following code generates the output below:class Person: def __init__(self, name, contact): self.name = name self.contact = contact def __str__(self): s = f"Name: {self.name}\nContact: {self.contact}" return s#Write your code hered = Doctor("Dr Strange", "4585632", "Neurosurgery", "DMC")d.add_patients("Dhaka Abdur Rahim", "Dhaka John Cena", "Narayanganj John Wick", "Comilla CM Punk")print("1.=========================================================")print(d)print("2.=========================================================")d.show_patient_list("Dhaka")print("3.=========================================================")d.show_patient_list("Rajshahi")print("4.=========================================================")d.add_patients("Narayanganj Naruto…
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This is C++. Please explain in details so I can understand the questions.What is the output of the following C++ program? #include <iostream>#include <string>using namespace std;class baseClass{public:void print() const;baseClass(string s = " ", int a = 0);//Postcondition: str = s; x = a;protected:int x;private:string str;};class derivedClass: public baseClass{public:void print() const;derivedClass(string s = "", int a = 0, int b = 0);//Postcondition: str = s; x = a; y = b;private:int y;};int main(){baseClass baseObject("This is the base class", 2);derivedClass derivedObject("DDDDDD", 3, 7);baseObject.print();derivedObject.print();system("pause");return 0;}void baseClass::print() const{cout << x << " " << str << endl;}baseClass::baseClass(string s, int a){str = s;x = a;}void derivedClass::print() const{cout << "Derived class: " << y << endl;baseClass::print();}derivedClass::derivedClass(string s, int a, int b) :baseClass("Hello…
Hello, I am having trouble with this homework question for my c++ course. Implement a Rational Number class with the following specifications. Data members a) numerator and denominator Functions a) Constructors: 1) default constructor 2) single parameter constructor to create numerator/1 3) dual parameter constructor to create numerator/denominator 4) Use constructor delegation across all constructors. b) Accessors and Mutators for both data members. c) Static recursive GCD function using Euclid's algorithm. d) Static LCM function for two numbers. e) Reduce function simplify a rational number. This function modifies its calling object. f) Your program should work with the supplied driver program. Notes LCM (Least Common Multiple) This function returns the smallest multiple of a and b. Step 1: Multiply a and b to find a common multiple. Step 2: Divide the common multiple by the GCD of a and b. Step 3: Return the result of Step 2. Reduce: This function reduces a fraction to…
Please code in C++ and U can take time for this one and please follows all the instruction. Thank you so much. A. Create an abstract base class called Currency with two integer attributes, both of which are non-public (Python programmers - it is understood that there is nothing private in Python but try to not access the attributes directly from outside the classes). The int attributes will represent whole part (or currency note value) and fractional part (or currency coin value) such that 100 fractional parts equals 1 whole part. B. Create two derived classes - Dollar and Pound - with one additional non-public string attribute which will contain the name of the currency (Dollar or Pound) respectively. DO NOT add this attribute to the base Currency class. C. In your base Currency class, add public methods for the following, where appropriate (C++ students are allowed to use friend methods as long as a corresponding class method is defined as well): Default Construction (i.e. no…
PLZ help with the following: IN JAVA Given the following code (where the function FunTest() and the main method are inside one class in the same file where classes X, Y and Z are), predict what is the output?
this is for a java class I need question 14.27 done