.C Interface to R

I'm following this guide: http://www.biostat.jhsph.edu/~rpeng/docs/interface.pdf

I want to create code copiled in C to use it in R So I created my hello.c file:

#include <R.h> void hello(int *n) { int i; for(i=0; i < *n; i++) { Rprintf("Hello, world!\n"); } } 

And I saved it in c:\temp Having done that, I must then compile the C code.

I honestly don't have any idea what I'm doing but I'm tring to write in windows cmd:

cd C:\Program Files\R\R-3.0.2\bin\ R CMD SHLIB c:\temp\hello.c 

And I get the error:

cygwin warning: MS-DOS style path detected: C:/PROGRA~1/R/R-30~1.2/etc/i386/Makeconf Preferred POSIX equivalent is: /cygdrive/c/PROGRA~1/R/R-30~1.2/etc/i386/Makeco nf CYGWIN environment variable option "nodosfilewarning" turns off this warning. Consult the user's guide for more details about POSIX paths: http://cygwin.com/cygwin-ug-net/using.html#using-pathnames make: * No rule to make target c:\temp\hello.o', needed byc:\temp\hello.dll '. Stop.

This should create a file names "hello.so". So I can call it in R with:

 dyn.load("hello.so") hello2 <- function(n) { .C("hello", as.integer(n)) } hello2(5) 

But my command doesn't create the hello.so file. Maybe I need to install another compiler, but I can't install software in the PC that I'm using. Is there a way to do it with the windows cmd? Where is my mistake?