我必须在NASM中插入数字。我有一个生成随机数的文件,并生成二进制数字的输出文件。我的程序将其作为输入文件加载,并且应该为输出提供使用插入排序排序的数字,也是二进制形式。
我的代码:
; Template assembler source file
section .text
global _start
_start:
; put your code here
mov eax, 3
mov ebx, 0
mov ecx, array
mov edx, 4*32768
int 80h
mov [fileLength], eax
shr eax,2
dec eax
mov [number], eax
mov ebx, 1
outerloop:
mov ecx,[array + 4*ebx]
mov [item],ecx
mov ecx,ebx
interloop:
mov edx,ecx
dec edx
mov esi, [array + 4*edx]
cmp esi,[array + 4*ecx]
jb koniec
mov eax,[array + 4*edx]
mov [array + 4*ecx],eax
loop interloop
koniec:
mov edx,[item]
mov [array + 4*ecx],edx
inc ebx
cmp ebx,[number]
jne outerloop
mov eax, 4
mov ebx, 1
mov ecx, array
mov edx, [fileLength]
int 80h
; exit to linux
mov eax,1
mov ebx,0
int 80h
; initialized data section
; use directives DB (byte), DW (word), DD (doubleword), DQ (quadword)
section .data
; uninitialized data section
; use directives RESB (byte), RESW (word), RESD (doubleword), RESQ (quadword)
section .bss
fileLength resd 1
number resd 1
array resd 32768
item resd 1
我用来编写插入排序的伪代码:
for i ← 1 to i ← length(A)-1
{
// A[ i ] is added in the sorted sequence A[0, .. i-1]
// save A[i] to make a hole at index iHole
item ← A[i]
iHole ← i
// keep moving the hole to next smaller index until A[iHole - 1] is <= item
while iHole > 0 and A[iHole - 1] > item
{
// move hole to next smaller index
A[iHole] ← A[iHole - 1]
iHole ← iHole - 1
}
// put item in the hole
A[iHole] ← item
}
来源:http://en.wikipedia.org/wiki/Insertion_sort
我对它的了解非常少,我不知道出了什么问题。它有时会排序前几个数字,但其余部分没有正确排序。
答案 0 :(得分:3)
您必须更改行
cmp esi, [array + 4*edx]
到
cmp esi, [item]
并在dec eax
之前删除outerloop
。它应该工作。