Structure default access modifier
Structure in C++ has been taken from C programming language and C does not support any OOP concept. All member variables and member functions are thus accessible from outside world.
In a C++ structure type, the default access modifier for structure member and member functions is "public". We need not to provide the keywork "public" in the class definition but that is default taken by the compiler.
Public members are the structure members (data members and member functions) that are open to the outside world. The public function members implement the concept of interfaces in object oriented programming.
Structure default access without "public"
Structure default access with "public"
The above two programs can compile fine since having "public" keyword or not is same for the compiler.
$ g++ struct.cpp
See also: What is the default access modifier for class members and member functions in c++?
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