calling convention in c

Question

some one please tell me how to change the default calling convention in c?

Answer 1

This largely depends on your compiler, toolchain, and platform. You will need to be more specific on what your environment is, and what you wish to change to.

Answer 2

Calling conventions are not specified by the language. They are extensions to your compiler.

That said, commonly you do something like:

void __fastcall my_func(void);

But this is completely dependent on your compiler and platform.