Extensions to Standard C
Unnamed Arguments in Function Definitions
C++ Comments
A # Not Followed by a Macro Argument
Using an Identifier After #endif
Using Typecasted Pointers as lvalues
Inline Functions
Pascal Calling Conventions
Character Constants as Integer Values
Converting Pointers to Types of the Same Size
Getting Alignment and Type Information at Compile Time
Arrays of Zero Length in Structures
The "D" Constant Suffix
The __typeof__() and typeof() Operators
Specifying Variable Addresses in C