File: exchange.cc

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c%2B%2B-annotations 13.02.02-1
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    #include <utility>
    #include <iostream>
    using namespace std;

    int main(int argc, char **argv)
    {
        bool more = argc > 5;

        cout << "more than 5: " << exchange(more, argc > 2) <<
                ", more than 2: " << more << '\n';
    }
    //  With `a.out one two three' displays:
    //
    //  more than 5: 0, more than 2: 1