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我是编程装配新手。现在我试图编写一个将数字从十进制转换为二进制的程序。但是我在尝试输入时遇到了一个程序。在输出msg2并进入循环之后,程序不会关闭。我可以输入很多数字,程序不会关闭。我想问题在于convertnumber:cmp si,cx(si是我需要输入多少个数字,cx - 我已经写了多少个数字),但我不确定。我在哪里犯了一个错误,我怎么能纠正它?装配编程错误
.MODEL small
.Stack 100h
.DATA
msg0 db 'how many numbers will include your input number(example. 123 is 3 numbers)? $'
msg1 db 'Now input number from 0 to 65535: $'
number db 255, ?, 256 dup ('$')
numberinAscii db 255, ?, 256 dup ('$')
enterbutton db 13,10,'$'
.CODE
start:
mov ax, @data
mov ds,ax
mov ah,09h
mov dx, offset msg0 ; first message output
int 21h
xor ah,ah ; function 00h of
int 16h ; int 16h gets a character (ASCII translation in AL)
int 3
mov bl,al
mov dl,al
mov ah,02h ; function 02h - display character
int 21h ; call DOS service
mov ah,09h
mov dx, offset enterbutton
int 21h
mov ah, 09h
mov dx, offset msg1 ; output second message
int 21h
jmp covertHowMany ; converting number that we entered
next:
xor si,si
mov si, ax ; number that we entered now is in si
xor cx,cx
mov cx,0 ;cx=0
enterfirstnumber: ;entering first number (example 123, first number is 1)
xor ah,ah
int 16h ; int 16h gets a one character
int 3
mov bl,al
mov dl,al
mov ah,02h ; function 02h - display character
int 21h ;
jmp convertnumber ; converting this number
input: ;converting number from ascii char to ascii integer
mov ax,bx
mov dx,10
mul dx ; ax:=ax*10
mov bx,ax ; number that I try to convert is in bx now
xor ah,ah
int 16h ; int 16h gets a character (ASCII translation in AL)
int 3
mov bl,al
mov dl,al
mov ah,02h ; function 02h - display character
int 21h
jmp convertnumber
convertHowMany:
sub al,30h ; convert from ascii character to ascii number
jmp next
convertnumber:
sub al,30h
add bx,ax
inc cx
cmp cx, si
jne input
jmp ending
ending:
mov ax,04C00h
int 21h
end start
强烈建议您将学习如何使用调试器,让你可以自己发现问题。 – 2014-10-05 15:15:59