Question 3 Three class definitions and a main function are given below: class A { public: }; class B public A { public: }; int }; class C public B { public: } -A() { std::cout << "-A()" << std::endl; } void f1() { std::cout << "A.fl()" << std::endl; } void f2() { std::cout << "A.f2()" << std::endl; } virtual void f3() = 0; B() {} virtual void f1() { std::cout << "B.fl()" << std::endl; } void f2() { std::cout << "B.f2()" << std::endl; } void f3() { std::cout << "B.f3()" << std::endl; } } C() { c = new int(0); } -C() { delete c; std::cout << "~C()" << std::endl; } void f1() { std::cout << "c.fl()" << std::endl; } void f2() { std::cout << "C.f2()" << std::endl; } void f3() { std::cout << "c.f3()" << std::endl; } int* c; The parts below provide a definition for the function f() called in main. For each part, 1) write the output of the program using the provided definition for f(), 2) if the code will result in a compilation error, write ERROR and briefly state why, and 3) if a memory leak exists, briefly state where the leak exists. } main() { f(); return 0; a. void f() { B b; A a = b; a.f2(); b. void f() { A a new C(); a->fl(); a->f2(); a->f3(); delete a; C. void f() { с с; B b = c; } b.fl(); b.f2(); b.f3(); d. void f() { } B* b = new C(); A* a = b; a->f1(); a->f2(); a->f3(); delete a;
Question 3 Three class definitions and a main function are given below: class A { public: }; class B public A { public: }; int }; class C public B { public: } -A() { std::cout << "-A()" << std::endl; } void f1() { std::cout << "A.fl()" << std::endl; } void f2() { std::cout << "A.f2()" << std::endl; } virtual void f3() = 0; B() {} virtual void f1() { std::cout << "B.fl()" << std::endl; } void f2() { std::cout << "B.f2()" << std::endl; } void f3() { std::cout << "B.f3()" << std::endl; } } C() { c = new int(0); } -C() { delete c; std::cout << "~C()" << std::endl; } void f1() { std::cout << "c.fl()" << std::endl; } void f2() { std::cout << "C.f2()" << std::endl; } void f3() { std::cout << "c.f3()" << std::endl; } int* c; The parts below provide a definition for the function f() called in main. For each part, 1) write the output of the program using the provided definition for f(), 2) if the code will result in a compilation error, write ERROR and briefly state why, and 3) if a memory leak exists, briefly state where the leak exists. } main() { f(); return 0; a. void f() { B b; A a = b; a.f2(); b. void f() { A a new C(); a->fl(); a->f2(); a->f3(); delete a; C. void f() { с с; B b = c; } b.fl(); b.f2(); b.f3(); d. void f() { } B* b = new C(); A* a = b; a->f1(); a->f2(); a->f3(); delete a;
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
Related questions
Question
f18
In c++
Transcribed Image Text:### Question 3
Three class definitions and a main function are given below:
```cpp
class A {
public:
~A() { std::cout << "~A()" << std::endl; }
void f1() { std::cout << "A.f1()" << std::endl; }
void f2() { std::cout << "A.f2()" << std::endl; }
virtual void f3() = 0;
};
class B : public A {
public:
B() {}
virtual void f1() { std::cout << "B.f1()" << std::endl; }
void f2() { std::cout << "B.f2()" << std::endl; }
void f3() { std::cout << "B.f3()" << std::endl; }
};
class C : public B {
public:
C() { c = new int(0); }
~C() { delete c; std::cout << "~C()" << std::endl; }
void f1() { std::cout << "C.f1()" << std::endl; }
void f2() { std::cout << "C.f2()" << std::endl; }
void f3() { std::cout << "C.f3()" << std::endl; }
int* c;
};
int main() {
f();
return 0;
}
```
The parts below provide a definition for the function `f()` called in `main`. For each part:
1. Write the output of the program using the provided definition for `f()`.
2. If the code will result in a compilation error, write ERROR and briefly state why.
3. If a memory leak exists, briefly state where the leak exists.
#### a.
```cpp
void f() {
B b;
A a = b;
a.f2();
}
```
#### b.
```cpp
void f() {
A* a = new C();
a->f1();
a->f2();
a->f3();
delete a;
}
```
#### c.
```cpp
void f() {
C c;
B b = c;
b.f1();
b.f2();
b.f3();
}
```
#### d.
```cpp
void f() {
B* b = new C();
A* a
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