如何在MASM中获取当前光标位置 [英] how to get current cursor position in MASM

问题描述

我正在编写一个IQ测试生成程序，在该程序中，我必须随机生成包含口头非口头问题的问题.为了产生非语言问题，我想显示字母和字母以圆形或三角形出现的问题.

I am writing an IQ test generation program in which i have to randomly generate questions that will include verbal non verbal questions. For generating non verbal questions i want to display questions in which alphabets and letters will appear in circular or triangular shape.

但是我不确定如何放置它们.例如，在一个非语言问题中，我想通过编写以下代码将字母和数字定位为三角形:

But i am not sure how to position them. E.g in a non verbal question i want to position alphabets and numbers in triangular shape by writing this code:

mov al, alpha 
call writechar
add dl, 4
call gotoxy
mov al, num
call writedec 
sub dl, 2
add dh, 1
call gotoxy
mov al, alpha 
call writechar

这是我已经知道的

dh =行

dl =列

致电gotoxy

Gotoxy将光标相对于控制台的起始位置而不是相对于当前位置定位.这就是我要解决的问题.

Gotoxy positions cursor relative to starting position of console, not relative to current position.This is the problem that i'm getting.

我认为应该有一种获取当前光标位置的方法，这样我就可以通过在 dh 和 dl 的当前值之间加减来来回定位光标连续生成形状.

I assume there should be a way of getting current cursors position so that i can position cursor back and forth by adding and subtracting from current value of dh and dl while generating shapes in series.

推荐答案

您可以在线获取Irvine32帮助: GetConsoleScreenBufferInfo .不幸的是，结构 CONSOLE_SCREEN_BUFFER_INFO 的描述不正确.适当的COORD结构的名称为 dwCursorPosition .

You can get the Irvine32 help online: http://programming.msjc.edu/asm/help/. There is a WinAPI function specified for getting the cursor position: GetConsoleScreenBufferInfo. Unfortunately the description of the structure CONSOLE_SCREEN_BUFFER_INFO is not correct. The name of the appropriate COORD structure is dwCursorPosition.

以下是使用方法的示例:

Here's an example how to use it:

INCLUDE Irvine32.inc
INCLUDELIB Irvine32.lib

.DATA
    txt1 db "Current Cursor Position is X=",0
    txt2 db " Y=",0
    BufferInfo CONSOLE_SCREEN_BUFFER_INFO <>

.CODE
main PROC

    lea edx, txt1
    call WriteString

    invoke GetStdHandle, STD_OUTPUT_HANDLE
    invoke GetConsoleScreenBufferInfo, eax, ADDR BufferInfo

    movzx eax, BufferInfo.dwCursorPosition.X
    call WriteInt

    lea edx, txt2
    call WriteString
    movzx eax, BufferInfo.dwCursorPosition.Y
    call WriteInt

    exit

main ENDP

END main

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