Header File 

dos.h  

Category 

Directory Control Routines 

Prototype 

int _getdrive(void); 

Description 

Gets the current drive. 

_getdrive gets the the current drive number. It returns an integer: 0 for A, 1 for B, 2 for C, and so on.  

Return Value 

_getdrive returns the current drive number on success or -1 in the event of error. 

Example  

#include <stdio.h>
#include <direct.h>
int main(void)
{
  int disk;
  disk = _getdrive() + 'A' - 1;
  printf("The current drive is: %c\n", disk);
  return 0;
}