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Question #221 Difficulty: 1

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

    #include <iostream>

struct C {
    int& i;
};

int main() {
    int x = 1;
    int y = 2;

    C c{x};
    c.i = y;

    std::cout << x << y << c.i;
}

Hint:

Note that C.i is a reference. What happens when we assign a new value to a reference?

Answer:

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