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Question #295 Difficulty: 1

According to the C++23 standard, what is the output of this program? 

    #include <iostream>

char a[2] = "0";

struct a_string {
    a_string() { *a='1'; }
    ~a_string() { *a='0'; }
    const char* c_str() const { return a; }
};

void print(const char* s) { std::cout << s; }
a_string make_string() { return a_string{}; }

int main() {
    a_string s1 = make_string();
    print(s1.c_str());

    const char* s2 = make_string().c_str();
    print(s2);

    print(make_string().c_str());
}

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