C++ quiz. Having the following class hierarchy, what will be

Having the following class hierarchy, what will be printed to the console?

#include <iostream>

using namespace std;

class A
{
  int m_i;
public:
  A(int i) : m_i(i) { }
  void print()
  {
    cout << sizeof(m_i) << endl;
  }
};

class B : virtual public A
{
public:
  B(int i) : A(i) { }
};

class C : public B
{
public:
  C(int i) : B(i) { }
};

int main()
{
  C c(1);
  c.print();
  return 0;
}

1
4
The result is not defined
The code will not compile
The result is dependent on the platform and the compiler

Explanation

Constructors are called first (explicitly or implicitly) from the bottom class on the hierarchy for virtual classes, in this case, class C. Since the constructor isn't invoked explicitly, then the default constructor is invoked implicitly, which is not defined in the class A. Hence the code will not compile.

Like

Login in to like
Comment

Login in to comment
Share

Tweet

C++
Quiz

or Read more about C++ Quizzes

Follow CodeGalaxy

Mobile Beta

Send Feedback