Floating point overflow capture in C

Question

I am trying to capture a floating point overflow in C. Here is what I tried

#define _GNU_SOURCE

#include <fenv.h>
#include <signal.h>
#include <stdio.h>

void catch_overflow (int sig) {   
  printf ("caught division by zero\n");   
  signal (sig, catch_overflow); 
}


int main(void) {   
  feenableexcept(FE_DIVBYZERO);   
  signal (FE_DIVBYZERO, catch_overflow);


  float a = 1., b = 0.;   float c = a/b;   return 0; }

I expected to see the message "caught division by zero", but I get a message about the core dump "Floating point exception (core dumped)". How can I change the program to get the message "caught division by zero"?

Thanks.

Answer 1

OS- . , FE_xxx SIGxxx. FE_DIVBYZERO (), SIGILL, ( , - Linux ).

Linux :

• SIGFPE.

• a, b, c volatile ( c INF ).

" ", . , , . , longjmp .

, FP.

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