int main(void) { float reale = 1.0f; float oneplus; int i; if (sizeof (float) != 4) exit (0); for (i = 0; ; i++) { oneplus = 1.0f + reale; if (oneplus == 1.0f) break; reale=reale/2.0f; } /* Assumes ieee754 accurate arithmetic above. */ if (i != 24) abort (); else exit (0); }