C and C++ Compatibility

The differences between ISO/ANSI C and C++ fall into two categories:

• Constructs found in both C++ and ISO/ANSI C, but treated differently in the two languages
  
• Constructs found in C++ but not in ISO/ANSI C, as follows:

• C++ Comments
• Scope operator (::)
• Free store management using the operators new and delete
• Linkage specification for functions
• Reference types
• Default arguments for functions
• Inline functions
• Classes
• Anonymous unions
• Overloaded operators and functions
• Class templates and function templates
• Exception handling

Note: The IBM C and C++ Compilers also supports anonymous unions in C, but the implementation is slightly different from C++. For more information, see Anonymous Unions in C.