控制I/O设备

[c]代码库

#include <stdio.h> 
#include <dir.h> 
#include <io.h> 

int main(void) 
{ 
   int stat; 

   /* use func 8 to determine if the default drive is removable */ 
   stat = ioctl(0, 8, 0, 0); 
   if (!stat) 
      printf("Drive %c is removable.\n", getdisk() + 'A'); 
   else 
      printf("Drive %c is not removable.\n", getdisk() + 'A'); 
   return 0; 
}