assembly - 在汇编 8086 中输出数字的 ASCII 字符

Question

我在斐波那契序列计算的每个步骤中输出计算值时遇到问题，它输出计算值的相应 ascii 字符，例如 ☺ ☻ ♥ ♣ 以及序列应该运行多少次取决于用户，但是它是限制为 47:

org 100h

ask_for_input db " Please enter a number[1-47]: ","$"
inputNumber DB 0  
conv DB 10D 
newL DB 0AH,"$"      


ask-again:        
    LEA DX, newL
    MOV AH,9H
    int 21H       

   ; Ask for user input       
   LEA DX, ask_For_input                       
   mov AH,9H
   int 21H             

   ; Gets user input
   ; First digit           
    MOV ah, 01H          
    int 21h

    SUB AL, 30H
    MUL conv   
    MOV inputNumber, AL

    ; Second Digit
    MOV AH, 01H 
    int 21h

    SUB AL, 30H
    add inputNumber, AL

    ; Checks if number is above 47D
    CMP inputNumber, 2FH
    JNLE ask-again  
    ; Checks if number is below 00D
    CMP inputNumber, 00H
    JLE ask-again    

; Squence loop Counter                      
MOV CH, 00H
MOV CL, inputNumber 

; Starting calculation
prev DB 01D   
current DB 1D            

Begin:
   space DB " ","$"
   LEA DX, space
   MOV AH,9H
   int 21H    

   ; Print Current Number                            
   LEA DX, current,"$" 
   mov AH,09H
   int 21H 

   ; Finds next number
   MOV BL, prev
   add current, BL 

   ; Advances prev
   MOV BL, current
   SUB BL, prev
   MOV prev, BL             

   Loop Begin

Answer 1

• 始终将数据放置在执行路径之外。现在，您已在指令之间放置了 prev、current 和 space 的数据。这将导致失败。

  ask_for_input db " Please enter a number[1-47]: ","$"
  inputNumber   DB 0  
  conv          DB 10D 
  newL          DB 0AH,"$"      
  prev          DB 01D   
  current       DB 01D,"$"            
  space         DB " ","$"
  

• 为了实际打印数字，您需要将其转换为字符。您的当前变量保存的是二进制值，而不是字符!此快速解决方案将仅显示单位数斐波那契数:

  ; Print Current Number                            
  add current, 30H
  LEA DX, current
  mov AH,09H
  int 21H 
  sub current, 30H