Answer the following questions for the program below: 1 #include <iostream>2 using namespace std;3 4 class Parent 5 {6 public:7 void f() 8 {9 cout << "invoke f from Parent" << endl; 10 }11 };1213 class Child: public Parent 14 {15 public:16 void f() 17 {18 cout << "invoke f from Child" << endl; 19 }20 };21 22 void p(Parent a) 23 {24 a.f(); 25 }26 27 int main() 28 {29 Parent a; 30 a.f(); 31 p(a);32 33 Child b; 34 b.f(); 35 p(b);36 37 return 0; 38 } a. What is the output of this program?b. What will be the output if line 7 is replaced by virtual void f()? c. What will be the output if line 7 is replaced by virtual void f() and line 22 is replaced by void p(Parent& a)?

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter10: Classes And Data Abstraction
Section: Chapter Questions
Problem 1TF: Mark the following statements as true or false. The member variables of a class must be of the same...
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Answer the following questions for the program below:

1 #include <iostream>
2 using namespace std;
3
4 class Parent

5 {
6 public:
7 void f()

8 {
9 cout << "invoke f from Parent" << endl;

10 }
11 };
12
13 class Child: public Parent

14 {
15 public:
16 void f()

17 {
18 cout << "invoke f from Child" << endl;

19 }
20 };
21
22 void p(Parent a)

23 {
24 a.f();

25 }
26
27 int main()

28 {
29 Parent a;

30 a.f();

31 p(a);
32
33 Child b;

34 b.f();

35 p(b);
36
37 return 0;

38 }

a. What is the output of this program?
b. What will be the output if line 7 is replaced by virtual void f()?
c. What will be the output if line 7 is replaced by virtual void f() and line 22 is replaced by void p(Parent& a)?

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