#include<stdlib.h>
#include<stdio.h>
#include<math.h>
#include<time.h>
#include "gsl/gsl_sf_hyperg.h" 
int main()
{
 double vx,ri;
vx=32.950611846591684;
ri = 1000.0;
printf("%lg\n",gsl_sf_hyperg_1F1(0.5+0.5 - vx,2.0,2*ri/vx));

vx=32.950611846591684;
ri = 4000.0;
printf("%lg\n",gsl_sf_hyperg_1F1(0.5+0.5 - vx,2.0,2*ri/vx));

return 0; 
}