Keyword Glossary


Used either to begin the definition of a class, or in templates to denote the template variable. Note that typename can also be used in the template case, but class will work.

public :

Used in class definitions. Public methods and variables can be accessed anywhere in the programme. They are accessed using . notation, e.g. class.PublicVariable .


Used in class definitions. Private methods and variables are only accessible by this class.

protected :

Used in class definitions. Protected methods and variables can be accesed by this class and any derived classes.


Used in template definitions to define the placeholder types, and should preferably be used instead of class.


Used to create a shorthand name for a commonly used template type, or to name a struct that you have defined (in C). This allows us to for example change a datatype without having to change every instance in the file. Consider using typedef to shorthand an iterator type, typedef iter std::map<std::string, double>::iterator. If we instead wanted a map of complex variables, we need only change the typedef line.


Used in C++11 to specify a situation where the compiler could infer the type required, for example to clean up the syntax of instantiating an iterator on a template container.