hw249_1.asm

汇编的例子利用汇编工具可编译通过不知是否有

.MODEL SMALL,C
.STACK 128
.DATA
    buff DB 5H, "ABCDE",0dh,0ah,"$"
.CODE
 Covert PROC  USES SI DI AX BX, String:PTR BYTE
	mov bx, String
	MOV si, bx
        inc si
        LEA DI,[SI+BX]

        xor ch, ch
        mov cl, [bx]
        shr cx, 1
        .repeat
          mov al, [si]
          xchg al, [di]
          mov [si], al
          inc si
          dec di
	.untilcxz
over:
	RET
Covert ENDP
       .STARTUP

       INVOKE Covert, ADDR buff

       MOV DX, offset buff+1
       MOV AH,9H
       INT 21H
       .EXIT 0
       END