Class members prefixed with underscore (
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From the C++03 standard: §17.4.3.1.2/1
Certain sets of names and function signatures are always reserved to the implementation:
Each name that contains a double underscore ( __ ) or begins with an underscore followed by an upper-case letter (2.11) is reserved to the implementation for any use.
Each name that begins with an underscore is reserved to the implementation for use as a name in the global namespace.
The equivalent text is present in C++11 §17.6.4.3.2/1
Personally, I use m_name , with 'm' standing for 'member'.
By the way, I also use p_ for parameters in my functions and g_ for the few unavoidable globals.
(then I usually get bashed by SO users because it looks like Hungarian notation ;-) But it is not.)
Please also look here: What are the rules about using an underscore in a C++ identifier?
I've seen a lot of code using single underscores as a prefix or double underscores in an indentifier and it simply worked. But you never know. The identifiers are reserved and anything may happen, depending on the compiler.
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