我正在编写一个程序来打印从 0 到 100 的所有数字。我这样做的唯一原因是测试打印出多位数字。
我遇到的问题是我的程序只打印出数字 1 和 2。我不知道为什么。我的编译器编译良好,没有错误,也没有链接器错误。
这是我的代码:
SECTION .data
len EQU 32
NUL EQU 0
countlen EQU 8
SECTION .bss
counter resb countlen
strlen resb countlen
SECTION .text
GLOBAL _start
_start:
mov BYTE[counter], 1 ; set counter to 1
mov BYTE[strlen], 1 ; set string length counter to 1
mov ecx, counter ; move the counter to ecx
add BYTE[ecx], NUL ; add null terminator to ecx
mov esi, 9 ; move 9 to esi
Length:
cmp [counter], esi ; compare counter to esi
jle Set ; if equal, goto set
inc BYTE[strlen] ; increment the string size
mov eax, 10 ; move 10 to eax
mov ebx, esi ; move esi to ebx
mul ebx ; multiply ebx by esi
add eax, 9 ; add nine to the result
mov esi, eax ; move the result to esi
jmp Length ; jump to Length
Set:
mov esi, 9 ; reset checker
Check:
cmp BYTE[strlen], 1 ; is it one digit?
je Single ; if yes, jump to single
cmp BYTE[strlen], 3 ; is it 100?
je Exit ; if yes, jump to Exit
Print: ; this section deals with multi-digit numbers
cmp BYTE[ecx], NUL ; check if end of string
je Exit ; if equal goto exit
mov eax, 4
mov ebx, 1
mov edx, 1
int 80h ; print number
inc ecx ; point to next digit in number
jmp Print ; jump to Print
Single: ; this section deals with single digit numbers add BYTE[counter], '0' ; convert to ASCII
mov eax, 4
mov ebx, 1
mov ecx, counter
mov edx, countlen
int 80h ; print the digit
jmp Length ; go back
Exit: ; Exit section
mov eax, 1 ; sys_exit
mov ebx, 0 ; return 0
int 80h ; syscall
为什么要这样做?另外,我需要更改什么才能使其按预期工作?
提前致谢,
RileyH
UPDATE:
编辑以包含“打印”标签