What is #pragma in c? can anyone explain

Question

what is #pragma in c? can anyone explain

Answer 1

It's a compiler specific preprocessor directive:

http://xoax.net/comp/cpp/reference/prepr...

The actual meaning depends on the argument used with the pragma.

Answer 2

It's a way of accessing compiler-specific features.  For example, some compilers allow you to change the padding used in structures with something like:

#pragma pack(2)

The only standard pragma is "error", which is a way to display a message and have the compiler generate an error.

#pragma error "text to display"

Any other pragma would be documented by your compiler's manufacturer somewhere in the documentation.

- kb -