如何获得CPU字长，是32bit还是64bit的？

标  题: Re: [求助]如何获得CPU字长，是32bit还是64bit的？
发信站: 北邮人论坛 (Fri Apr 23 12:54:56 2010), 站内
  
  
int cpu_bits(void *dummy1, void *dummy2)
{
     long offset = (long)&dummy2 - (long)&dummy1;
     int ret = 0;
     if (8 == offset)
         ret = 64;
     else if (4 == offset)
         ret = 32;
     else if (2 == offset)
         ret = 16;
     else if (1 == offset)
         ret = 8;
     else
         ret = -1;
     return ret;  
}
  
int main()
{
     printf("%d\n", cpu_bits(NULL, NULL));
     return 0;
}