汇编语言两个多位十进制数相加代码ppt课件.ppt

将两个多位十进制数相加将两个多位十进制数相加 两两加加数数以以ASCII码码形形式式各各自自顺顺序序存存放放在在以以DATA1 和和DATA2为为首首的的5个个内内存存单单元元中中，，(低低位位在在前前)其其和和 要求送回要求送回DATA1 处 CRLF MACRO MOV DL,0DH MOV AH,02H INT 21H MOV DL,0AH MOV AH,02H INT 21H ENDM1；. DATA SEGMENT DATA1 DB 33H , 39H , 31H , 37H , 34H DATA2 DB 36H , 35H , 30H , 38H , 32H DATA CODE SEGMENT ASSUME CS:CODE, DS:DATA, ES:DATA START: MOV AX,DATA MOV DS,AX MOV SI,OFFSET DATA2 MOV BX,5 CALL DISPL CRLF MOV SI,OFFSET DATA1 MOV BX,5 CALL DISPL CRLF 2；. MOV D1,OFFSET DATA2 CALL ADDA MOV SI,OFFSET DATA1 MOV BX,5 CALL DISPL CRLF MOV AX,4C00H INT 21H DISPL PROC NEAR DSI: MOV AH,02H MOV DL,[SI+BX-1] INT 21H DEC BX JNZ DS1 RET DISPL ENDP3；. ADDA PROC NEAR MOV DX,SI MOV BP,DI MOV BX,5 AD1: SUB BYTE PTR [SI+BX-1],30H SUB BYTE PTR [DI+BX-1],30H DEC BX JNZ AD1 MOV CX,5 CLC AD2: MOV AL, [SI] MOV BL, [DI] ADC AL, BL AAA MOV [SI], AL INC SI INC DI LOOP AD2 4；. MOV SI,DX MOV DI,BP MOV BX,05 AD3: ADD BYTE PTR [SI+BX-1],30H ADD BYTE PTR [DI+BX-1],30H DEC BX JNZ AD3 RET ADDA ENDP CODE ENDS END START5；.。