[R] c code in R

[solares@unsl.edu.ar]

Hi, my question is How i cant to execute c code within R for example
name of program probe.c (in workpath of R)
#include<stdio.h>
void main(){
int x;
scanf("%d\n",&x)
printf("%d\n",x)
}
 and in R i make 
.c("probe.c")
i'm obtain no load table simbol, but i compile the program with Borland C 
5.0 and obtain the .obj archive (probe.obj and the .exe).I have to make the 
load in R?. What is wrong?, Thanks Ruben