汇编两个十进制数相乘，以二进制和十六进制分别输出
实验7：数值运算与数据输出
1、实验目的：掌握通过键盘输入接收字符串、乘法运算、2/16进制数与ASCII码之间相互转换以及数据显示输出的程序设计方法。
2、实验内容：从键盘输入2个0–99之间的整数，对其做乘法运算，在屏幕上显示出该乘积对应的二进制和十六进制数。
3、实验要求：
（1）在屏幕提示：“please input the first number(0–99): ”后，输入一个0–99之间的整数。
若所输入的数不在此范围内，或输入其它字符，则屏幕提示：“input an invalid number, input again!”；
（2）在屏幕提示：“please input the second number(0–99): ”后，输入一个0–99之间的整数。
若所输入的数不在此范围内，或输入其它字符，则屏幕提示：“input an invalid number, input again!”。
（3）对2个整数做乘法运算。
（4）在屏幕上显示出乘积所对应的二进制和十六进制数；
（5）显示部分功能要求用子程序实现。
直接上代码了
DATAS SEGMENT
string1 db 0aH,'please input the first number(0-99):',0ah,'$'
string2 db 0ah,'please input the second number(0-99):',0ah,'$'
string3 db 0ah,'input an invalid number,input again:',0ah,'$'
x1 db 8,?,8 dup(?)
x2 db 8,?,8 dup(?)
num1 dw ?
num2 dw ?
num dw ?
table DB 30H,31H,32H,33H,34H,35H,36H,37H,38H,39H
DB 41H,42H,43H,44H,45H,46H,47H,48H,49H,4AH,4BH,4CH,4DH,4EH,4FH,50H,51H,52H
DB 53H,54H,55H,56H,57H,58H,59H,5AH
;此处输入数据段代码
DATAS ENDS
STACKS SEGMENT
db 8 dup(?)
;此处输入堆栈段代码
STACKS ENDS
CODES SEGMENT
ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
MOV AX,DATAS
MOV DS,AX
mov dx,offset string1
mov ah,09h
int 21h
;input the number1
mov dx,offset x1
mov ah,0ah
int 21h
jmp compire1
again1:
lea dx,string3
mov ah,09h
int 21h
mov dx,offset x1
mov al,00h
mov x1[4],al
mov ah,0ah
int 21h
compire1:
;inspect the number1
xor al,al
mov al,x1[2]
cmp al,'-'
jz again1
cmp al,'9'
jnbe again1
mov al,x1[3]
cmp al,'9'
jnbe again1
mov al,x1[4]
cmp al,'0'
jnb again1
;show the second tip
mov dx,offset string2
mov ah,09h
int 21h
;input the numebr2
mov dx,offset x2
mov ah,0ah
int 21h
jmp compire2
again2:
lea dx,string3
mov ah,09
int 21h
mov dx,offset x2
mov al,00h
mov x2[4],al
mov ah,0ah
int 21h
compire2:
xor al,al
mov al,x2[2]
cmp al,'-'
jz again2
cmp al,'9'
jnbe again2
mov al,x2[3]
cmp al,'9'
jnbe again2
mov al,x2[4]
cmp al,'0'
jnb again2
;begin to mul the two numbers
xor ax,ax
mov bl,10
mov al,x1[2]
sub al,30h
mov cl,x1[3]
cmp cl,0dh
jz non1_
;cmp cl,0
;jnz sub1
;jz non1
sub1:
mul bl
sub cl,30h
jmp non1
non1_:
mov cl,0
non1:
add al,cl
mov num1,ax
xor ax,ax
mov al,x2[2]
sub al,30h
mov cl,x2[3]
cmp cl,0dh
jz non2_
;cmp cl,0
;jnz sub2
;jz non2
sub2:
mul bl
sub cl,30h
jmp non2
non2_:
mov cl,0
non2:
add al,cl
mov num2,ax
xor bx,bx
xor ax,ax
mov ax,num1
mov bx,num2
mul bx
mov num,ax
mov bx,offset table
call print_H
call print_B
;此处输入代码段代码
MOV AH,4CH
INT 21H
print_H proc near
push ax
push cx
push dx
mov dl,0ah
mov ah,02h
int 21h
mov ax,num
xor cx,cx
mov cl,4
mov al,ah
shr al,cl
xlat
mov dl,al
mov ah,02h
int 21h
mov ax,num
mov al,ah
and al,0fh
xlat
mov dl,al
mov ah,02h
int 21h
mov ax,num
shr al,cl
xlat
mov dl,al
mov ah,02h
int 21h
mov ax,num
and al,0fh
xlat
mov dl,al
mov ah,02h
int 21h
mov dl,'H'
int 21h
mov dl,0ah
int 21h
pop dx
pop cx
pop ax
ret
print_H endp
print_B proc near
push ax
push bx
push cx
push dx
xor bx,bx
mov ax,num
mov bl,ah
mov cx,8
s1:
mov dl,30h
shl bl,1
adc dl,0
mov ah,02h
int 21h
loop s1
mov ax,num
mov bl,al
mov cx,8
s2:
mov dl,30h
shl bl,1
adc dl,0
mov ah,02h
int 21h
loop s2
mov dl,'B'
int 21h
pop ax
pop bx
pop cx
pop dx
ret
print_B endp
CODES ENDS
END START