Why using namespace std is necessary here?

Posted by symfony on Stack Overflow See other posts from Stack Overflow or by symfony
Published on 2010-03-24T16:54:27Z Indexed on 2010/03/24 17:03 UTC
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#include <iostream>
using namespace std;

int main() {
    cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
    return 0;
}

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