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About trapping software floating-point division-by-zero errors

Software floating-point division-by-zero errors can be trapped with the __ieee_status intrinsic.


This traps any division-by-zero errors in code, and untraps all other exceptions, as illustrated in the following example:

#include <stdio.h>
#include <fenv.h>
int main(void)
{    float a, b, c;
    // Trap the Invalid Operation exception and untrap all other
    // exceptions:
    c = 0;
    a = b / c;
    printf("b / c = %f, ", a); // trap division-by-zero error
    return 0;