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Question #106 Difficulty: 3

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

    #include <iostream>

extern "C" int x;
extern "C" { int y; }

int main() {

	std::cout << x << y;

	return 0;
}

Hint:

Is there a difference between the two extern syntaxes? Something to do with declarations and definitions?

Answer:

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