從鍵盤輸入兩個2位十六進制數，相加，
結果以十進制形式顯示在屏幕上。（要求結果顯示完整的算式）
題目鏈接：http://zhidao.baidu.com/question/983257464781691619.html
做而論道編程如下：
;=================================
ASSUME CS:CODE, DS:DATA
DATA SEGMENT
MSG1 DB 13, 10, 'Please input number_1: $'
MSG2 DB 13, 10, 'Please input number_2: $'
CRLF DB 13, 10, '$'
NN DB ?, ?
MM DB ?
DATA ENDS
;---------------------------------
CODE SEGMENT
START:
MOV AX, DATA
MOV DS, AX
;-----------------------
LEA DX, MSG1
MOV AH, 9
INT 21H
CALL IN_CHAR
MOV MM, AL
LEA DX, MSG2
MOV AH, 9
INT 21H
CALL IN_CHAR
MOV NN, AL
LEA DX, CRLF
MOV AH, 9
INT 21H
MOV AL, MM
CALL OUT_NUM
MOV DL, '+'
MOV AH, 2
INT 21H
MOV AL, NN
CALL OUT_NUM
MOV DL, '='
MOV AH, 2
INT 21H
MOV AL, NN
ADD AL, MM
MOV AH, 0
ADC AH, 0
CALL OUT_1
EXIT:
MOV AH, 4CH
INT 21H ;返回DOS
;---------------------------------
IN_CHAR:
LEA BX, NN
MOV CX, 2
IN_1:
MOV AH, 1
INT 21H
CMP AL, '0'
JB IN_1
CMP AL, 'F'
JA IN_1
CMP AL, '9'
JBE _09
CMP AL, 'A'
JB IN_1
SUB AL, 7
_09:
SUB AL, 30H
MOV [BX], AL
INC BX
LOOP IN_1
XCHG AL, NN
MOV BL, 16
MUL BL
ADD AL, NN
RET
;---------------------------------
OUT_NUM:
MOV AH, 0
OUT_1:
MOV DX, 0
MOV BX, 100
DIV BX
XCHG AX, DX
CALL OUT_CHAR
MOV DX, 0
MOV BX, 10
DIV BX
XCHG AX, DX
CALL OUT_CHAR
MOV DL, AL
CALL OUT_CHAR
RET
;---------------------------------
OUT_CHAR:
PUSH AX
ADD DL, 30H
MOV AH, 2
INT 21H
POP AX
RET
;---------------------------------
CODE ENDS
END START
;=================================
提問者評價：太給力了，你的回答完美的解決了我的問題 ！