检查设备类型

[c]代码库

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

int main(void) 
{ 
   int handle; 

   handle = fileno(stdprn); 
   if (isatty(handle)) 
      printf("Handle %d is a device type\n", handle); 
   else 
      printf("Handle %d isn't a device type\n", handle); 
   return 0; 
}