what is the meaning and use of #pragma in c language or c++ language?

Answer 1

#pragma is used to control the compiler options like preprocessor extension to it
For example: #pragma align - to control memory alignment

Answer 2

http://www.cprogramming.com/reference/preprocessor/pragma.html

kindly let me know if you want any clarification

Answer 3

http://en.cppreference.com/w/cpp/preprocessor/impl

Answer 4

The c language by dennis ritchie second edition

http://www.geeksforgeeks.org/c/

Answer 5

ramesh marisa plz give me reference about of this.

Answer 6

thanks ramesh and one more question can u plz suggest me best website or book to learn c or c++ headers file?