在两个不同的行上打印一个字符串 [英] print a string on two different lines

问题描述

我正在尝试让我的程序在两个不同的行上显示一个字符串.

I am trying to get my program to display a string on two different lines.

这是一个.com程序，我正在使用A86汇编程序.

This is a .com program and I am using A86 assembler.

jmp start               ; This will start the program

;============================

  msg   db  "Hello Word.$"      ; A string variable 
  msg   db  "Michael J. Crawley$"   ; A string variable with a value.

;============================

start:

  mov ah,09             ; subfunction 9 output a string

  mov dx,offset msg         ; DX for the string

  int 21h               ; Output the message

  int 21h               ; Output the message

exit:

  mov ah,4ch
  mov al,00             ; Exit code 

  int 21h               ; End program

推荐答案

以下是您的特定问题:

• 您两次定义msg(a86会拒绝).
• 您以msg的 same 值调用int21 fn9，因此您不会打印出两条消息，而只是打印出第一条消息的两个副本.
• 任何一条消息中都没有换行符，因此它们彼此邻接而不是放在单独的行上.

• You define msg twice (a86 will barf on that).
• You call int21 fn9 with the same value of msg so you're not printing the two messages out, just two copies of the first.
• You don't have a newline character in either message so they'll abut each other rather than be on separate lines.

针对这些问题的解决方案(不提供实际代码).

The solutions to those points (without providing the actual code).

• 将第二条消息标记为msg2.
• 在第二次调用int21之前，将msg2加载到dx中.
• 更改消息以在"$"符号(或至少第一个符号)之前放置换行符.

• Label the second message as msg2.
• Load msg2 into dx before calling int21 for the second time.
• Change the messages to put a newline before the '$' symbol (or at least the first one).

更新:由于其他有用的灵魂已经提供了源代码，因此这是我的解决方案.我建议您学习，并修改自己的代码以执行类似的操作.如果您从公共站点逐字抄袭该文件进行课堂作业，几乎肯定会因抄袭而被抓到

Update: Since some other helpful soul has already provided source, here's my solution. I would suggest you learn from this and modify your own code to do a similar thing. If you copy it verbatim from a public site for classwork, you'll almost certainly be caught out for plagiarism:

         jmp start                   ; This will start the program

msg      db  "Hello Word.",0a,"$"    ; A string variable .
msg2     db  "Michael J. Crawley$"   ; A string variable with a value.

start:   mov ah,09                   ; subfunction 9 output a string
         mov dx,offset msg           ; DX for the string
         int 21h                     ; Output the message
         mov dx,offset msg2          ; DX for the string
         int 21h                     ; Output the message
exit:
         mov ah,4ch
         mov al,00                   ; Exit code 
         int 21h                     ; End program

这将输出:

Hello Word.
Michael J. Crawley

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