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Question #179 Difficulty: 2

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

    #include <iostream>

int main() {
    const int i = 0;
    int& r = const_cast<int&>(i);
    r = 1;
    std::cout << r;
}

Hint:

We've casted away constness, but we're still attempting to modify i, which is const.

Answer:

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