汇编考试参考

输入字符串大小写转换（其他字符不变）【老师说过可能会考】DATAS SEGMENT;此处输入数据段代码BUF DB 50N DB?DB 50 DUP(0)DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA SI,BUFMOV DX,SIMOV AH,0AHINT 21H ;输入字符串MOV DL,13MOV AH,2INT 21HMOV DL,10MOV AH,2INT 21H ;回车换行MOV CL,N;取输入字符个数为循环次数L1: MOV AL,[SI+2]CMP AL,41HJB L2CMP AL,5AHJBE L3CMP AL,61HJB L2CMP AL,7AHJBE L4L4: SUB AL,20HJMP L2L3: ADD AL,20H;小写的减20H,大写的加20H,其他的不变L2: MOV [SI+2],AL ;改变完保存INC SI ;指针指向下一个字符LOOP L1;*****输出结果******MOV CL,NLEA SI,BUFL5: MOV DL,[SI+2]MOV AH,02HINT 21HINC SILOOP L5MOV AH,4CHINT 21HCODES ENDSEND START2、将字符转换成ASCII码输出(转化方法要理解) DATAS SEGMENT;此处输入数据段代码HEX DB 1,0AH,5,0FH DATAS ENDS STACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA BX,HEXMOV CX,4L1: MOV DL,[BX]INC BXADD DL,30HCMP DL,39HJBE L2ADD DL,7L2: MOV AH,2INT 21HLOOP L1MOV AH,4CHINT 21HCODES ENDSEND START【程序只是基本程序，具体应用在显示内存中的BCD码。

如我们做BCD码加法时要显示结果就可以把这个程序整合进去。

程序简单就不做解释了。

】3、十进制加法（指针指向要知道）DATAS SEGMENT;此处输入数据段代码DATA1 DB' 34567',0DH,0AH,'$' DATA2 DB'+56780',0DH,0AH,'$' DATA3 DB 6 DUP(?)DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA BX,DATA1 ;被加数首地址LEA SI,DATA2 ;加数首地址LEA DI,DATA3 ;结果存放位置MOV AH,09HMOV DX,BXINT 21H ;输出被加数MOV AH,09HMOV DX,SIINT 21H ;输出加数MOV CX,5 ;取循环次数为5次CLCL1: MOV AL,[BX+5] ;指向被加数个位ADC AL,[SI+5] ;指向加数的个位AAA;BCD码加法调整PUSHFOR AL,30H ;和转换成ASCII码POPFMOV [DI],ALDEC BXDEC SIINC DILOOP L1MOV CX,6L5: MOV DL,'_'MOV AH,02HINT 21HLOOP L5 ;输出下划线MOV DL,0DHMOV AH,02HINT 21HMOV DL,0AHMOV AH,02HINT 21H ;回车换行JNC L2MOV DL,'1'MOV AH,02HINT 21H ;判断最高位是否有进位，有则输出‘1’，没有则输出‘’JMP L3L2: MOV DL,' 'MOV AH,02HINT 21HL3: DEC DIMOV CX,5L4: MOV DL,[DI]MOV AH,02HINT 21HDEC DILOOP L4 ;输出结果MOV AH,4CHINT 21HCODES ENDSEND START4、键盘输入任意位数乘任意位数（这题老师说过可能会考）重要！DATAS SEGMENT;此处输入数据段代码A DB 20N1 DB?DB 20 DUP(0)B DB 20N2 DB?DB 20 DUP(0)DATA3 DW 2 DUP(?);用于储存16进制乘数DATA4 DW 2 DUP(?);用于储存乘积DATA5 DB 10 DUP(?) ;把乘积转化为ASCII码DATA0 DB 0DH,0AH,'$' ;回车换行符DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA SI,AMOV DX,SIMOV AH,0AHINT 21HCALL H1MOV AL,N1CBWMOV CX,AXAND AX,0L1: MOV DX,10MUL DXAND DX,0;被乘数转化为十六进制数MOV DL,[SI+2]SUB DL,30HADD AX,DXINC SILOOP L1MOV DATA3,AXLEA BX,BMOV DX,BXMOV AH,0AHINT 21HCALL H1MOV AL,N2CBWMOV CX,AXAND AX,0L3: MOV DX,10MUL DXAND DX,0;乘数转化为十六进制数MOV DL,[BX+2]SUB DL,30HADD AX,DXINC BXLOOP L3MOV DATA3[2],AXMOV BX,DATA3MUL BXMOV DATA4,DXMOV DATA4[2],AXLEA SI,DATA5;把十六进制结果转化为ASCII码MOV CX,1L7:MOV DX,0MOV AX,DATA4MOV BX,10DIV BXMOV DATA4,AXMOV AX,DATA4[2]DIV BXMOV DATA4[2],AXADD DL,30HMOV [SI],DLINC SIINC CXCMP AX,9JA L7ADD AL,30HMOV [SI],AL;输出结果L8: MOV DL,[SI]MOV AH,02HINT 21HDEC SILOOP L8MOV AH,4CHINT 21HH1 PROCLEA DX,DATA0MOV AH,09HINT 21HRETH1 ENDPCODES ENDSEND START5、BCD码乘法（理解加的过程，还有显示时转换成ASCII码过程）DATAS SEGMENT;此处输入数据段代码A DB 12HB DB 36H DATAS ENDSCODES SEGMENTASSUME CS:CODES,DS:DATASSTART:MOV AX,DATASMOV DS,AX;此处输入代码段代码MOV AX,0MOV AL,BYTE PTR BMOV DL,ALAND DL,0FHMOV CL,4SHL AX,CLMOV AL,AHMOV DH,10MUL DHADD AL,DLMOV CL,ALCBWCLCMOV DL,BYTE PTR AMOV AX,0L1: ADD AL,DLDAAADC AH,0LOOP L1PUSH AXMOV DL,AHOR DL,30HMOV AH,2INT 21HPOP AXAND AX,00FFHMOV BL,ALAND BL,0FHOR BL,30HMOV CL,4SHL AX,CLOR AH,30HMOV DL,AHMOV AH,02HINT 21HMOV DL,BLMOV AH,02HINT 21HMOV AH,4CHINT 21HCODES ENDSEND START6、键盘输入十个两位数排序并显示排序结果（冒泡排序）DATAS SEGMENT;此处输入数据段代码MARK DB 10 DUP(0) GRADE DB 10 DUP(0) DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUME CS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA SI,MARKMOV CX,10L1: MOV AH,01HINT 21HSUB AL,30HMOV BL,10MUL BLMOV DL,ALMOV AH,01HINT 21HSUB AL,30HADD AL,DLMOV [SI],ALINC SIMOV DL,' 'MOV AH,02HINT 21HLOOP L1LEA SI,MARKLEA DI,GRADEMOV CX,10L9: MOV AL,[SI]MOV [DI],ALINC SIINC DILOOP L9MOV DL,9L2: MOV BX,1MOV CL,DLLEA DI,GRADE L3: MOV AL,[DI]CMP AL,[DI+1]JAE L4XCHG AL,[DI+1]MOV [DI],ALXOR BX,BXL4: INC DILOOP L3DEC DLCMP BX,1JNZ L2MOV DL,13MOV AH,2INT 21HMOV DL,10MOV AH,2INT 21HMOV CX,10LEA DI,GRADE L5: MOV AX,0MOV AL,[DI]MOV BL,10DIV BLOR AX,3030HMOV BL,AHMOV DL,ALMOV AH,02INT 21HMOV DL,BLMOV AH,02HINT 21HMOV DL,' 'MOV AH,2INT 21HINC DILOOP L5MOV AH,4CHINT 21H CODES ENDSEND START键盘输入加法DATAS SEGMENTDATA1 DB 4 DUP (?) DATA2 DB 4 DUP (?) DATA3 DB 5 DUP (0) DATAS ENDS STACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA BX,DATA1MOV CX,4L1: MOV AH,1INT 21HSUB AL,30HMOV [BX],ALINC BXLOOP L1MOV DL,'+'MOV AH,2INT 21HLEA SI,DATA2MOV CX,4L2: MOV AH,1INT 21HSUB AL,30HMOV [SI],ALINC SILOOP L2MOV SI,3MOV CX,4L3: MOV AL,DATA1[SI]ADC AL,DATA2[SI]AAAMOV DATA3[SI+1],ALDEC SILOOP L3 MOV DL,'='MOV AH,2INT 21HJC L5JMP L0L5: MOV DL,'1'MOV AH,2INT 21HL0:MOV CX,4MOV SI,1L4:MOV AH,2MOV DL,DATA3[SI]ADD DL,30HINC SIINT 21HLOOP L4MOV AH,4CHINT 21HCODES ENDSEND START键盘乘法DATAS SEGMENTDATA1 DB 5 DUP(?)DATA2 DB ?DATA3 DB 6 DUP(0);此处输入数据段代码DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA SI,DATA1MOV CX,5L1: MOV AH,1INT 21HSUB AL,30HMOV [SI],ALINC SILOOP L1MOV DL,'*'MOV AH,2INT 21HMOV AH,1INT 21HSUB AL,30HMOV BL,ALMOV SI,4MOV CX,5L2: MOV AL,DATA1[SI]MUL BLAAMADC AL,DATA3[SI+1]AAAMOV DATA3[SI+1],ALMOV DATA3[SI],AHDEC SILOOP L2MOV DL,'='MOV AH,2INT 21HLEA DI,DATA3 MOV DH,[DI]CMP DH,0JZ L4MOV DL,[DI]ADD DL,30HMOV AH,2INT 21HL4: MOV CX,5LEA DI,DATA3[1]L3: MOV AH,2MOV DL,[DI]ADD DL,30HINC DIINT 21HLOOP L3MOV AH,4CHINT 21HCODES ENDSEND STAR T大小写统计个数DATAS SEGMENT;此处输入数据段代码DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKSSTART:MOV AX,DATASMOV DS,AX;此处输入代码段代码 mov dx,0mov bx,0L0: mov ah,1int 21hcmp al,0dhjz dispcmp al,30hjb L1cmp al,39hja L1inc bljmp L0L1: cmp al,41Hjb L0cmp al,'Z'ja L2inc dljmp L0L2: cmp al,61hjb L0cmp al,'z'ja L0inc dhjmp L0disp:PUSH DXMOV DL,0AHMOV AH,2INT 21HPOP DXmov al,blcall displaymov al,dlcall displaymov al,dhcall displayMOV AH,4CHINT 21Hdisplay proc【;push dx ;mov ch,2;L6: mov cl,4;ror al,cl;mov dh,al;and al,0fh;cmp al,0ah;jb L5;add al,7;L5: add al,30h;mov ah,2;mov dl,al;int 21h;mov al,dh;dec ch;jnz L6;pop dx 】显示十六进制【push dxmov bl,10mov ah,0div blmov dh,ahadd al,30hmov dl,almov ah,2int 21hmov ah,dhadd ah,30hmov dl,ahmov ah,2int 21hpop dx】显示十进制数retdisplay endpCODES ENDSEND START带符号数并输出负数DATAS SEGMENT;此处输入数据段代码S DB-5,45,72,66,-58,72,55,55,-2,39 N DB $-S-1M DB $-S-1DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码MOV DX,0L1: MOV BX,1MOV AL,NCBWMOV CX,AXLEA SI,SL2: MOV AL,[SI]CMP AL,[SI+1]JGE L3XCHG AL,[SI+1]MOV [SI],ALXOR BX,BXINC DXL3: INC SILOOP L2DEC NCMP BX,1JNZ L1MOV CL,4PUSH DXSHR DL,CLADD DL,30HCMP DL,39HJBE L4ADD DL,7CMP DL,30HJE L6 L4: MOV AH,2INT 21HL6: POP DXAND DL,0FHADD DL,30HCMP DL,39HJBE L5ADD DL,7L5: MOV AH,2INT 21HMOV DL,13MOV AH,2INT 21HMOV DL,10MOV AH,2INT 21HMOV AL,MCBWMOV CX,AXLEA SI,SL8: MOV BL,[SI] CMP BL,0JGE L7NEG BLMOV DL,'-'MOV AH,2INT 21HAND BL,7FH L7: MOV AL,BLMOV AH,0MOV BH,10DIV BHPUSH AXOR AL,30HMOV DL,ALCMP DL,'0'JE L9MOV AH,2INT 21HL9: POP AXOR AH,30HMOV DL,AHMOV AH,2INT 21HMOV DL,' 'MOV AH,02INT 21HINC SILOOP L8MOV DL,13MOV AH,2INT 21HMOV DL,10MOV AH,2INT 21HMOV DL,' 'MOV AH,2INT 21HLEA SI,SMOV CX,0MOV CL,MMOV BL,'1'LB: MOV DL,BLMOV AH,2INT 21HMOV DL,' 'MOV AH,2INT 21HMOV DL,' 'MOV AH,2INT 21HMOV AL,[SI+1]CMP AL,[SI]JE LAINC BLLA: INC SILOOP LBMOV AH,4CHINT 21HCODES ENDSEND START十六进制转二进制数DATAS SEGMENTDATA1 DB 4 DUP(?)A DB 'ERROR:','$'B DB 'REPUT:','$';此处输入数据段代码DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码LEA SI,DATA1MOV CX,4L1: MOV AH,1INT 21HMOV [SI],ALINC SILOOP L1MOV DL,0DHMOV AH,2INT 21HMOV DL,0AHMOV AH,2INT 21HMOV SI,0MOV CX,4L6: MOV BL,DATA1[SI]CMP BL,'0'JB L0CMP BL,'f'JA L0CMP BL,'9'JBE L2CMP BL,'A'JB L0CMP BL,'F'JBE L3CMP BL,'a'JB L0L3: SUB BL,7L2: PUSH CXMOV CL,4SHL BL,CLMOV CX,4L5:MOV DL,'0'SHL BL,1JNC L4INC DLL4: MOV AH,2INT 21HLOOP L5POP CXINC SILOOP L6JMP L8L0:MOV DL,0DHMOV AH,2INT 21HMOV DL,0AHMOV AH,2INT 21HLEA DX,AMOV AH,9INT 21HMOV DL,0DHMOV AH,2INT 21HMOV DL,0AHMOV AH,2INT 21HLEA DX,BMOV AH,9INT 21HJMP L1L8: MOV AH,4CHINT 21HCODES ENDSEND START数字排序统计maxDATAS SEGMENTDATA1 DB 8 DUP(?);此处输入数据段代码DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AXLEA SI,DATA1MOV CX,8L1: MOV AH,1INT 21HMOV [SI] ,ALINC SILOOP L1MOV BL,0L4: MOV SI,0MOV CX,8MOV DI,0L3: MOV AL,DATA1[SI]CMP AL,DATA1[SI+1]JGE L2XCHG DATA1[SI+1],ALMOV DATA1[SI],ALMOV DI,1INC BLL2: INC SILOOP L3TEST DI,01HJZ EXITLOOP L4EXIT:MOV DL,0DHMOV AH,2INT 21HMOV DL,0AHMOV AH,2INT 21HMOV CX,8MOV SI,0L5:MOV DL,DATA1[SI]MOV AH,2INC SIINT 21HLOOP L5MOV DL,0DHMOV AH,2INT 21HMOV DL,0AHMOV AH,2INT 21HMOV AL,BL mov ch,2L6: mov cl,4ror al,clmov dh,aland al,0fh cmp al,0ah jb L7add al,7L7: add al,30h mov ah,2mov dl,alint 21hmov al,dhdec chjnz L6MOV DL,0DHMOV AH,2INT 21HMOV DL,0AHMOV AH,2INT 21HLEA DI,DATA1 MOV DL,[DI] MOV AH,2INT 21HMOV AH,4CH INT 21H CODES ENDSEND START四则运算DATAS SEGMENT;此处输入数据段代码data1 db 5 dup(?)data2 db ?data3 db 6 dup(0)data4 db 6 dup(?)data5 db 6 dup(?) DATAS ENDSSTACKS SEGMENT;此处输入堆栈段代码STACKS ENDSCODES SEGMENTASSUMECS:CODES,DS:DATAS,SS:STACKS START:MOV AX,DATASMOV DS,AX;此处输入代码段代码mov cx,5lea si,data1L1: mov ah,1int 21hand al,0fhmov [si],alinc siloop L1mov dl,'*'mov ah,2int 21hmov ah,1int 21hmov cx,5mov [si],alsub al,30hmov bl,allea di,data3[5]dec si L2: mov al,[si]mul blaamadd al,[di]aaamov [di],aldec dimov [di],ahdec siloop L2mov dl,'+'mov ah,2int 21hmov cx,6mov ah,1lea si,data4L3: int 21hand al,0fhmov [si],alinc siloop L3mov si,5mov cx,6L4: mov al,data3[si]adc al,data4[si]aaamov data5[si],aldec siloop L4mov dl,'='mov ah,2int 21hmov cx,6mov si,0L5: mov dl,data5[si] add dl,30hint 21hinc siloop L5MOV AH,4CHINT 21HCODES ENDSEND START。