// Demonstrate glibc 2.2+ feenableexcept

#define _GNU_SOURCE
#include <math.h>
#include <fenv.h>
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char **argv)
{
  if (argc != 3) {
    fprintf(stderr, "Usage: %s a b  # floating-point divide a by b\n", argv[0]);
    return 1;
  }

  feenableexcept(FE_DIVBYZERO);
  double a = atof(argv[1]), b = atof(argv[2]);
  printf("%g ÷ %g = %g\n", a, b, a/b);
  return 0;
}