在DOS中获取键盘输入而没有回声 [英] Getting keyboard input without echo in DOS

问题描述

我正在制作四人连线"游戏.

I am making the game "Connect Four".

播放器必须输入1-4之间的数字，这样光盘才能放入列之一.我目前正在第一栏上工作.问题在于您可以输入任何字符，并且该字符将起作用(仅当您按"1"时才需要起作用)，而我不知道如何解决该问题.

The players have to enter a number between 1-4 so that the disc will drop into one of the columns. I am currently working on the first column. The problem is that you can enter any character and it will work (it only needs to work when you press '1') and I cant figure out how to fix it.

此外，数字出现在屏幕的左侧. 我如何做到这一点，所以当我输入一个不会在屏幕上显示的数字时?

Moreover, the number appears on the left side of the screen. How do I make it so when I enter the number it won't show on the screen?

PlayerOneTurn:
    cmp [Player1Turn], 255
    je Player1Pressed1

Player1Pressed1:
    mov ah, 1
    int 21h
    cmp al, 31h
    je Player1Check1

Player1Check1:
    cmp [FirstColumnArray], 0
    inc [FirstColumnArray]
    je DrawPlayer1Disc
    cmp [FirstColumnArray + 1], 0
    inc [FirstColumnArray]
    je DrawPlayer1Disc
    cmp [FirstColumnArray + 2], 0
    inc [FirstColumnArray]
    je DrawPlayer1Disc
    cmp [FirstColumnArray + 3], 0
    inc [FirstColumnArray]
    je DrawPlayer1Loop

DrawPlayer1Loop:
    mov bh,0h
    mov cx,[Player1Draw1x]
    mov dx,[Player1Draw1y]
    mov al,[player1disccolor]
    mov ah,0ch
    int 10h
    inc [Player1Draw1x]
    cmp cx, 38h
    jl DrawPlayer1Loop

DrawPlayer1Disc: 
    mov bh, 0h
    inc [Player1Draw1y]
    mov [Player1Draw1x], 25h
    cmp dx, 09Bh
    jl DrawPlayer1Loop

运行时，我的项目如下:

When run my project looks like this:

推荐答案

mov ah, 1
int 21h
cmp ah, 31h

您使用的DOS函数在AL寄存器中产生结果！
使用cmp al, 31h比较按键是否为"1".

The DOS function that you used produces a result in the AL register!
Use cmp al, 31h to compare for a "1" keypress.

要不在屏幕上回显输入，请使用DOS功能7代替1.

To not have the input echoed on the screen use DOS function 7 in stead of 1.

mov ah, 7
int 21h
cmp al, 31h

---

Player1Pressed1:
 mov ah, 1
 int 21h
 cmp al, 31h
 je Player1Check1
Player1Check1:

使用此代码，您始终可以在 Player1Check1 处执行该代码.当输入不为"1"时，您需要跳开它.添加jmp

With this code you always execute the code at Player1Check1. You need to jump away from it when the input is not "1". Add a jmp

Player1Pressed1:
 mov ah, 1
 int 21h
 cmp al, 31h
 je Player1Check1
 jmp ELSEWHERE_YOU_KNOW_WHERE_THIS_IS
Player1Check1:

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