There are six predefined symbolic constants (Fig. F.1). The identifiers for each of these begin and (and, except for __cplusplus, end) with two underscores. These identifiers and the defined preprocessor operator (Section F.5) cannot be used in #define or #undef directives.
Symbolic constant |
Description |
---|---|
__LINE__ |
The line number of the current source code line (an integer constant). |
__FILE__ |
The presumed name of the source file (a string). |
__DATE__ |
The date the source file is compiled (a string of the form "Mmm dd yyyy" such as "Aug 19 2002"). |
__STDC__ |
Indicates whether the program conforms to the ANSI/ISO C standard. Contains value 1 if there is full conformance and is undefined otherwise. |
__TIME__ |
The time the source file is compiled (a string literal of the form "hh:mm:ss"). |
__cplusplus |
Contains the value 199711L (the date the ISO C++ standard was approved) if the file is being compiled by a C++ compiler, undefined otherwise. Allows a file to be set up to be compiled as either C or C++. |
Introduction to Computers, the Internet and World Wide Web
Introduction to C++ Programming
Introduction to Classes and Objects
Control Statements: Part 1
Control Statements: Part 2
Functions and an Introduction to Recursion
Arrays and Vectors
Pointers and Pointer-Based Strings
Classes: A Deeper Look, Part 1
Classes: A Deeper Look, Part 2
Operator Overloading; String and Array Objects
Object-Oriented Programming: Inheritance
Object-Oriented Programming: Polymorphism
Templates
Stream Input/Output
Exception Handling
File Processing
Class string and String Stream Processing
Web Programming
Searching and Sorting
Data Structures
Bits, Characters, C-Strings and structs
Standard Template Library (STL)
Other Topics
Appendix A. Operator Precedence and Associativity Chart
Appendix B. ASCII Character Set
Appendix C. Fundamental Types
Appendix D. Number Systems
Appendix E. C Legacy Code Topics
Appendix F. Preprocessor
Appendix G. ATM Case Study Code
Appendix H. UML 2: Additional Diagram Types
Appendix I. C++ Internet and Web Resources
Appendix J. Introduction to XHTML
Appendix K. XHTML Special Characters
Appendix L. Using the Visual Studio .NET Debugger
Appendix M. Using the GNU C++ Debugger
Bibliography