Cdecl

[MarcoMB]

Can someone explains what's the function of "cdecl" for example in stdio.h ?
for example the following line

_CRTIMP int __cdecl printf(const char *, ...);

what does?
In stdio.h there isn't classical functions definitions, so where are definitions? the line above calls something related with definitions such as modules or dlls?

 

[ArkM]

__cdecl
Microsoft Specific —>
This is the default calling convention for C and C++ programs. ...
Place the __cdecl modifier before a variable or a function name. Because the C naming and calling conventions are the default, the only time you need to use __cdecl is when you have specified the /Gz (stdcall) or /Gr (fastcall) compiler option. The /Gd compiler option forces the __cdecl calling convention.
...

Use modern (Standard) <cstdio> header in C++ code. Of course, no function definitions in cstdio (and in stdio.h) header. There are function declarations only in std header files. Function bodies (definitions) are placed in run-time library (RTL) source modules. For example, see printf source in printf.c file of RTL (get Pro or Enterprise VS editions with RTL sources included).
In VS distributives all RTL modules are compiled and packed into system lib/dll files.
So don't worry about RTL functions definitions...