enum5.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 27 行

// { dg-do run }
// Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc.
// Contributed by Ben Elliston <[e-mail]>

// PR 80: Packed enums use minimum required storage.

extern "C" void abort();

enum numbers { one, two, three } __attribute__ ((packed)) nums;
enum colours { red = 1000, green, blue } __attribute__ ((packed)) cols;
enum conditions { fine, rain, cloudy } __attribute__ ((packed)) forecast;

int
main()
{
  if (sizeof (nums) != 1)
    abort ();

  if (sizeof (cols) != 2)
    abort ();

  if (sizeof (forecast) != 1)
    abort ();

  return 0;
}