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constructorhttps://www.cppreference.com/cpp/language/constructor
1 Syntaxhttps://www.cppreference.com/cpp/language/default_constructor#Syntax
2 Explanationhttps://www.cppreference.com/cpp/language/default_constructor#Explanation
3 Implicitly-declared default constructorhttps://www.cppreference.com/cpp/language/default_constructor#Implicitly-declared_default_constructor
4 Implicitly-defined default constructorhttps://www.cppreference.com/cpp/language/default_constructor#Implicitly-defined_default_constructor
5 Deleted default constructorhttps://www.cppreference.com/cpp/language/default_constructor#Deleted_default_constructor
6 Trivial default constructorhttps://www.cppreference.com/cpp/language/default_constructor#Trivial_default_constructor
7 Eligible default constructorhttps://www.cppreference.com/cpp/language/default_constructor#Eligible_default_constructor
8 Noteshttps://www.cppreference.com/cpp/language/default_constructor#Notes
9 Examplehttps://www.cppreference.com/cpp/language/default_constructor#Example
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11 See alsohttps://www.cppreference.com/cpp/language/default_constructor#See_also
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