Language in C 面试题与答案

Question: How do I write code to get the current drive as well as set the current drive?

Answer: The function getdisk( ) returns the drive number of current drive. The drive number 0 indicates 'A' as the current drive, 1 as 'B' and so on. The Setdisk( ) function sets the current drive. This function takes one argument which is an integer indicating the drive to be set. Following program demonstrates use of both the functions.

#include <dir.h>

main( )
{
int dno, maxdr ;

dno = getdisk( ) ;
printf ( "nThe current drive is: %cn", 65 + dno
) ;

maxdr = setdisk ( 3 ) ;
dno = getdisk( ) ;
printf ( "nNow the current drive is: %cn", 65 +
dno ) ;
}