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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，如 ☺ ☻ ♥ ♣ 序列应该运行多少次取决于用户，但它限制为 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
4

1 回答 1

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  • 始终将数据放在执行路径之外。现在您已经在指令之间放置了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。您当前的变量包含二进制值，而不是字符！此快速解决方案将仅显示一位数斐波那契数：

    ; Print Current Number                            
add current, 30H
LEA DX, current
mov AH,09H
int 21H 
sub current, 30H
于 2016-01-14T11:43:25.117 回答