The C++ language is based on the C language and includes all of the advantages of C listed above. In addition, C++ also supports object-oriented concepts, generic types or templates, and an extensive library. For a detailed description of the differences between z/OS® XL C++ and z/OS XL C, refer to z/OS XL C/C++ Language Reference.
The C++ language introduces classes, which are user-defined data types that may contain data definitions and function definitions. You can use classes from established class libraries, develop your own classes, or derive new classes from existing classes by adding data descriptions and functions. New classes can inherit properties from one or more classes. Not only do classes describe the data types and functions available, but they can also hide (encapsulate) the implementation details from user programs. An object is an instance of a class.
The C++ language also provides templates and other features that include access control to data and functions, and better type checking and exception handling. It also supports polymorphism and the overloading of operators.