北京理工大学汇编上机试题和代码(8)

JB NEXT CMP AL,'z' JBE ZIMU1 NEXT:

INC SI

LOOP AGAIN LEA DX,KONGGE MOV AH,09H INT 21H

MOV AH,4CH INT 21H KONGGE1:

LEA DI,KONGGE MOV AL,[DI+8] INC AL

CMP AL,3AH JZ JINWEI

MOV [DI+8],AL JMP NEXT JINWEI:

SUB AL,10 MOV [DI+8],AL MOV AL,[DI+7] INC AL

MOV [DI+7],AL JMP NEXT SHUZI1:

LEA DI,SHUZI MOV AL,[DI+7] INC AL

CMP AL,3AH JZ JINWEI1 MOV [DI+7],AL JMP NEXT JINWEI1:

SUB AL,10 MOV [DI+7],AL MOV AL,[DI+6] INC AL

MOV [DI+6],AL JMP NEXT ZIMU1:

LEA DI,ZIMU MOV AL,[DI+6]

INC AL

CMP AL,3AH JZ JINWEI2 MOV [DI+6],AL JMP NEXT JINWEI2:

SUB AL,10 MOV [DI+6],AL MOV AL,[DI+5] INC AL

MOV [DI+5],AL JMP NEXT MOV AH,4CH INT 21H CODES ENDS END START

23.编写程序，将十个字的有符号数中最大、最小值求出，并在显示器上输出。 125ah，4357h，0f50h，0b43h，4ac4h，7454h，8b15h，0a2a4h，0f3ch，00f6h

DATAS SEGMENT MAX DW 0 MIN DW 0

STR1 DB 'THE MAX NUMBER IS $'

STR2 DB 0AH,0DH,'THE MIN NUMBER IS $' DATAS ENDS

CODES SEGMENT

ASSUME CS:CODES,DS:DATAS START:MOV AX,DATAS MOV DS,AX NEXT: MOV BX,0 CONTINUE: MOV AH,01H INT 21H CMP AL,0DH JZ OUTPUT CMP AL,'h' JZ XIAYIGE CMP AL,'9' JA ZIMU1 SUB AL,30H JMP LEIJIA ZIMU1:

SUB AL,57H LEIJIA:

XOR AH,AH XCHG AX,BX MOV CX,16 MUL CX ADD AX,BX XCHG AX,BX JMP CONTINUE XIAYIGE: MOV DL,0AH MOV AH,02H INT 21H

MOV DL,0DH MOV AH,02H INT 21H CMP BX,0 JL NAGETIVE JMP POSITIVE NAGETIVE: LEA SI,MIN MOV AX,[SI] CMP AX,BX JG JIAOHUAN JMP NEXT POSITIVE: LEA SI,MAX MOV AX,[SI] CMP AX,BX JB JIAOHUAN JMP NEXT JIAOHUAN: MOV [SI],BX JMP NEXT OUTPUT: LEA DX,STR1 MOV AH,09H INT 21H LEA SI,MAX MOV BX,[SI] MOV CL,4 MOV CH,4 CONTINUE2: ROL BX,CL

MOV AL,BL AND AL,0FH ADD AL,30H CMP AL,'9' JA ZIMU2 SHUCHU1: MOV DL,AL MOV AH,02H INT 21H DEC CH

JNZ CONTINUE2 JMP H1 ZIMU2: ADD AL,27H JMP SHUCHU1 H1:

MOV DL,'h' MOV AH,02H INT 21H LEA DX,STR2 MOV AH,09H INT 21H LEA SI,MIN MOV BX,[SI] MOV CL,4 MOV CH,4 CONTINUE3: ROL BX,CL MOV AL,BL AND AL,0FH ADD AL,30H CMP AL,'9' JA ZIMU3 SHUCHU2: MOV DL,AL MOV AH,02H INT 21H DEC CH CMP CH,0

JNZ CONTINUE3 JMP H2 ZIMU3: ADD AL,27H JMP SHUCHU2

H2:

MOV DL,'h' MOV AH,02H INT 21H

MOV AH,4CH INT 21H CODES ENDS END START

24、键盘输入10个字节数（无符号数），求出最大、最小值，并在显示器上输出。 DATAS SEGMENT MAX DB 0 MIN DB 0FFH

STR1 DB 'THE MAX NUMBER IS $'

STR2 DB 0AH,0DH,'THE MIN NUMBER IS $' DATAS ENDS

CODES SEGMENT

ASSUME CS:CODES,DS:DATAS START:

MOV AX,DATAS MOV DS,AX MOV DH,10 NEXT:

MOV BX,0 CONTINUE:

MOV AH,01H INT 21H CMP AL,'h' JZ XIAYIGE CMP AL,'9' JA ZIMU1 SUB AL,30H JMP LEIJIA ZIMU1:

SUB AL,57H LEIJIA:

XOR AH,AH XCHG AL,BL MOV CL,16 MUL CL ADD AL,BL XCHG AL,BL

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