error directive

#error directive

Issues an error message

---

 #error   message   

The #error directive tells the preprocessor to issue an error message and mark the source file as ill- formed , just as if the programmer made a programming error that the compiler detected . You can supply any sequence of preprocessor tokens as the message , and those tokens are echoed in the error message.

Example

 #if !defined(_  _cplusplus)  (_  _cplusplus < 199711L)   #error Not a conforming C++ compiler. #endif 

See Also

#line directive