930217-1.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 21 行

/* The bit-field below would have a problem if __INT_MAX__ is too
   small.  */
#if __INT_MAX__ < 2147483647
int a;
#else
double g ();
typedef union {
  struct {
    unsigned s:1, e:8, f:23;
  } u;
  float f;
} s;

f(x, n)
     float x;
{
  ((s *)&x)->u.e -= n;
  x = g((double)x, -n);
}
#endif