?? a-long.c
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#include <stdio.h>static long a [10];static long e [0]; /* GCC only */int main (void) { printf ("+++Array long:\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;}?? 快捷鍵說明
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