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#include <signal.h>
#include <stdlib.h>

volatile sig_atomic_t denom;

void sighandle(int s) {
  /* Fix the offending volatile */
  if (denom == 0) {
    denom = 1;
  }
}

int main(int argc, char *argv[]) {
  int result = 0;
    
  if (argc < 2) {
    return 0;
  }
  denom = (sig_atomic_t) strtol(argv[1], NULL, 10);
    
  signal(SIGFPE, (*sighandle));

  result = 100 / (int)denom;
  return 0;
}

#include <signal.h>
#include <stdlib.h>

volatile sig_atomic_t denom;

void sighandle(int s) {
  /* Recovery is impossible */
  abort();
}

int main(int argc, char *argv[]) {
  int result = 0;
    
  if (argc < 2) {
    return 0;
  }
  denom = (sig_atomic_t) strtol(argv[1], NULL, 10);
    
  signal(SIGFPE, (*sighandle));

  result = 100 / (int)denom;
  return 0;
}