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Why should a class have private members?
Essentially, private members allow a class to hide its implementation details from external consumers. This allows a class to better control how it data and behavior will be expressed, and allows the consumer to be ignorant of details that are not relevant to the primary purpose of the class.
Why is a header file necessary?
Header files serve two purposes. System header files declare the interfaces to parts of the operating system. Each time you have a group of related declarations and macro definitions all or most of which are needed in several different source files, it is a good idea to create a header file for them.
How do you access members of the class inside a member function?
How to access members of the class inside a member function? Explanation: The members of a class can be used directly inside a member function. We can use this pointer when there is a conflict between data members of class and arguments/local function variable names.
Is it necessary to use header file in C?
Yes, because it’s still based on C. You can answer your own question: Don’t use them and try to compile without them. If you can’t, then the compilers still require them.
Who can access protected members in a class?
Protected members in a class are similar to private members as they cannot be accessed from outside the class. But they can be accessed by derived classes or child classes while private members cannot.
Do private functions really need to be in header file?
C++, do private functions really need to be in the header file? I have always thought of header files as a sort of ‘public interface’ describing a class, in which case it would be better to keep private fields and functions in the cpp file.
Why do I put public headers in Inc?
This way the user will be given a hint that he has to include only the public headers – those that are in “inc” and only those headers contain the stuff he really needs, while all other headers are “private” and out of his interest area unless he wants to read into the implementation.
Why do I need a header file for MyClass?
This is where header files come in. Header files allow you to make the interface (in this case, the class MyClass) visible to other .cpp files, while keeping the implementation (in this case, MyClass’s member function bodies) in its own .cpp file. That same example again, but tweaked slightly:
What should be included in a header file?
The #include statement is basically like a copy/paste operation. The compiler will “replace” the #include line with the actual contents of the file you’re including when it compiles the file. – Header files should use a .h__ extension (.h / .hpp / .hxx).