C++ Quiz

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Question #160 Difficulty:

According to the C++11 standard, what is the output of this program?

#include <iostream>

struct A {
    virtual void foo (int a = 1) {
        std::cout << "A" << a;
    }
};

struct B : A {
    virtual void foo (int a = 2) {
        std::cout << "B" << a;
    }
};

int main () {
    A *b = new B;
    b->foo();
}

Hint:

Does an overriding function in a derived class acquire default arguments from the function it overrides?

Answer:

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