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Question #126 Difficulty: 2

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

    #include<iostream>

int foo()
{
  return 10;
}

struct foobar
{
  static int x;
  static int foo()
  {
    return 11;
  }
};

int foobar::x = foo();

int main()
{
    std::cout << foobar::x;
}

Hint:

This question is about the lookup-rules for foo in the definition of x. Will the global foo or the member foo be chosen? If you don't know, think about some other scenarios for definition of class members, which scope would it make sense to have access to?

Answer:

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