Thanks Igor, Dave and Teun! I was missing the call to srand48(0); that "unlocked" both drand48 and erand48. My code (at least the random number part) is now working.
In case anyone else is trying to do something similar a working snippet is below. Thanks to everybody who took time to help! Robert #include <iostream> #include <math.h> using namespace std; int main(int argc,char* argv[]){ unsigned short FinishSeed[3]={1,2,3}; srand48(0); //Initializes seed AND multiplicand for (int i=0; i < 10; i++){ printf("%g %g \n",drand48(),erand48(FinishSeed)); } return 0; } -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/