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Question #192 Difficulty: 2

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

    #include <vector>
#include <iostream>

std::vector<int> v;

int f1() {
  v.push_back(1);
  return 0;
}

int f2() {
  v.push_back(2);
  return 0;
}

void g(int, int) {}

void h() {
 g(f1(), f2()); 
}

int main() {
  h();
  h();
  std::cout << (v[0] == v[2]);
}

Hint:

The evaluation order of function argument expressions is unspecified.

Answer:

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