What is the output of this program?

1.
    #include 
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    #include 
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    using namespace std;
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    class myexception: public exception
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    {
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        virtual const char* what() const throw()
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        {
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            return "My exception";
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        }
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    } myex;
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    int main () 
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    {
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        try
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        {
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            throw myex;
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        }
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        catch (exception& e)
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        {
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            cout << e.what() << endl;
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        }
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        return 0;
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    }