求高手帮忙看看思路和语句还有什么不对的么

P.s__葬爱

题目：求0-9任意数的平方并输出
代码段：
data segment
   x dw ?
   msg db‘this is an error!$'
data ends
code segment
  assume cs: code,ds:data
start:
  mov ax,data
  mov ax,x
  mov ah,1
  int 21h
  mov ds,ax
  cmp x,0
  jl exit0
  cmp x,9
  jg exit0
  mov ax,x
  imul ax,ax
  mov ah,9
  int 21h
exit0:
  mov ah,9
  mov dx,offset ,msg
  mov ah,4h
  int 21h
code ends
end start

菇凉’

{:7_165:}看不懂

s0512

1. data segment
   
2. x dw 0,0,'$'
   
3. msg db 'this is an error!$'
   
4. data ends
   
5. code segment
   
6. assume cs: code,ds:data
   
7. start:
   
8. mov ax,data
   
9. mov ds,ax
   
10. mov ah,1
    
11. int 21h
    
12. mov bx,0
    
13. cmp al,30h
    
14. jb exit0
    
15. cmp al,39h
    
16. ja exit0
    
17. mov ah,0
    
18. and al,00001111b
    
19. mul al
    
20. call htod
    
21. mov ah,9
    
22. int 21h
    
23. mov ah,01
    
24. int 21h
    
25. exit0:
    
26. lea dx, msg
    
27. mov ah,9
    
28. int 21h
    
29. mov ax,4c00h
    
30. int 21h
    
31. htod:
    
32. push bx
    
33. push dx
    
34. push si
    
35. mov si,0
    
36. mov bl,10
    
37. star: div bl
    
38. cmp ah,0
    
39. je h_ok
    
40. add ah,30h
    
41. mov dh,0
    
42. mov dl,ah
    
43. push dx
    
44. inc si
    
45. xor ah,ah
    
46. jmp star
    
47. h_ok: mov cx,si
    
48. mov bx,0
    
49. h_s: pop word ptr ds:[bx]
    
50. inc bx
    
51. loop h_s
    
52. pop si
    
53. pop dx
    
54. pop bx
    
55. ret
    
56. code ends
    
57. end start

复制代码

DEBUG下查看正常。。。
但直接运行有乱码。。。
超出我能力范围了。。。

s0512

1. data segment
   
2. x dw 0,0,'
   
3. 
   
4. 
   
5. msg db 'this is an error!
   
6. 
   
7. 
   
8. data ends
   
9. code segment
   
10. assume cs: code,ds:data
    
11. start:
    
12. mov ax,data
    
13. mov ds,ax
    
14. mov ah,1
    
15. int 21h
    
16. mov bx,0
    
17. cmp al,30h
    
18. jb exit0
    
19. cmp al,39h
    
20. ja exit0
    
21. mov ah,0
    
22. and al,00001111b
    
23. mul al
    
24. call htod
    
25. lea dx,x
    
26. mov ah,9
    
27. int 21h
    
28. mov ah,01
    
29. int 21h
    
30. exit0:
    
31. lea dx, msg
    
32. mov ah,9
    
33. int 21h
    
34. mov ax,0100h
    
35. int 21h
    
36. htod:
    
37. push bx
    
38. push dx
    
39. push si
    
40. mov si,0
    
41. mov bl,10
    
42. star: div bl
    
43. cmp ah,0
    
44. je h_ok
    
45. add ah,30h
    
46. mov dh,0
    
47. mov dl,ah
    
48. push dx
    
49. inc si
    
50. xor ah,ah
    
51. jmp star
    
52. h_ok: mov cx,si
    
53. mov bx,0
    
54. h_s: pop word ptr ds:[bx]
    
55. inc bx
    
56. loop h_s
    
57. pop si
    
58. pop dx
    
59. pop bx
    
60. ret
    
61. code ends
    
62. end start

复制代码

s0512

楼主试下，有问题没

s0512

木有长进，一点功能写N长！

阔怀

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