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Can you compile and run the following code? What will be the output? #include <iostream>using namespace std; class A{ public:virtual void f() = 0; };class B: public A {public: void f(){cout << "invoke f from B" << end1; }};class C: public B {public:virtual void m() = 0; };class D: public C {public:virtual void m() {cout << "invoke m from D" << end1; }};void p(A& a) {a.f(); }int main() {D d;p(d);d.m();return 0; }

Can you compile and run the following code? What will be the output? #include <iostream>using namespace std; class A{ public:virtual void f() = 0; };class B: public A {public: void f(){cout << "invoke f from B" << end1; }};class C: public B {public:virtual void m() = 0; };class D: public C {public:virtual void m() {cout << "invoke m from D" << end1; }};void p(A& a) {a.f(); }int main() {D d;p(d);d.m();return 0; }

Database System Concepts
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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Question

Can you compile and run the following code? What will be the output?

#include <iostream>
using namespace std; class A
{

public:
virtual void f() = 0;

};
class B: public A

{
public: void f()
{
cout << "invoke f from B" << end1; }
};
class C: public B

{
public:
virtual void m() = 0;

};
class D: public C

{
public:
virtual void m()

{
cout << "invoke m from D" << end1;

}
};
void p(A& a)

{
a.f();

}
int main()

{
D d;
p(d);
d.m();
return 0;

}

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