Hi there,
Thank you all for your timely response. I find the right way to do it. There is a good example in Dr. Burns website:
http://www.burns-stat.com/pages/Spoetry/Spoetry.pdf
Page 174.
So this is the right way to do:
#include <stdio.h> #include <math.h> #include <stdlib.h> #include <time.h>
double test(double alpha)
{
double value;
value = alpha *3;
return(value);
}
void main2(double *alpha, double *beta) { double test(double); *beta= *alpha *2 + test(*alpha); }
After compiling it by MINGW, you can use the following code in R:
dyn.load("c:/Program Files/R/rw1060/bin/main2.dll")
a=4.2
b=0
c=.C('main2', as.double(a), as.double(b))[[2]]Hope this helps!
Sincerely,
Lei Liu
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