[c++] namespace 사용 예

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#include <iostream> // iostream을 사용

using namespace std;

int main()

{

    cout << "Hi..!" << endl;

    return 0;

}

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#include <iostream>

using std::cout;

using std::endl;

int main()

{

    cout << "Hi..!" << endl;

    return 0;

}

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#include <iostream>

int main()

{

    std::cout << "Hi..!" << std::endl;

    return 0;

}

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