由3926个源代码

				/* LASTDRV2.C -- uses only documented DOS */
				
				#include 
				#include 
				
				main()
				{
				    unsigned lastdrv;
				
				#ifdef __TURBOC__
				    asm mov ah, 19h         /* C-style comments only */
				    asm int 21h
				    asm mov dl, al
				    asm mov ah, 0x0e        /* C-style hex */
				    asm int 21h             /* assembly-style hex */
				    asm xor ah, ah
				    asm mov lastdrv, ax     /* refer to C variables */
				#elif (defined(_MSC_VER) && (_MSC_VER >= 600)) || defined(_QC)
				    _asm {
				        mov ah, 19h         ; can include assembly-style comments
				        int 21h             /* and C-style as well */
				        mov dl, al          // and this style as well
				        mov ah, 0x0E        ; can include C-style hex numbers
				        int 21h             ; or assembly-style hex numbers
				        xor ah, ah
				        mov lastdrv, ax     ; can refer to C variables in _asm
				        }
				#else
				#error Requires inline assembler
				#endif
				
				    fputs("LASTDRIVE=", stdout);
				    putchar('A' - 1 + lastdrv);
				    putchar('\n');
				    return lastdrv;
				}