Shulou(Shulou.com)06/01 Report--

Scope

Scope keyword

Public:public indicates that the data member and member function are open to all users, and all users can call them directly.

Protected:protected is public for children and friends, and it can be used freely without any restrictions, while for other external class,protected, it becomes private.

Private:private means private, private means that no one can use it directly except class himself, private property is sacred and inviolable, even children and friends can not use it.

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