You've answered 0 of 164 questions correctly. (Clear)

Question #124 Difficulty: 3

According to the C++17 standard, what is the output of this program?

    #include <iostream>

using namespace std;

struct A {};
struct B {};

template<typename T = A>
struct X;

struct X<A> {
   static void f() { cout << 1; }

struct X<B> {
   static void f() { cout << 2; }

template< template<typename T = B> class C>
void g() {

int main() {


Problems? View a hint or try another question.

I give up, show me the answer (make 3 more attempts first).

Mode : Training

You are currently in training mode, answering random questions. Why not Start a new quiz? Then you can boast about your score, and invite your friends.


Create your own!

Android app

Get Sergey Vasilchenko's CppQuiz Android app.