#include static double a [10]; static double e [0]; /* GCC only */ int main (void) { printf ("+++Array double:\n"); printf ("size=%d,align=%d,5th-elem-offset=%d,5th-elem-align=%d\n", sizeof (a), __alignof__ (a), (char *) &a[5] - (char *) a, __alignof__ (a[5])); printf ("size=%d,align=%d,5th-elem-offset=%d,5th-elem-align=%d\n", sizeof (e), __alignof__ (e), (char *) &e[5] - (char *) a, __alignof__ (e[5])); return 0; }