7. Program to Random Screen Locations in Assembly Language using Visual Studio

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Chapter 5

Procedures

Assembly Language Programming Exercise

Problem # 7:

Write a program that displays a single character at 100 random screen locations, using a timing delay of 100 milliseconds. Hint: Use the GetMaxXY procedure to determine the current size of the console window.

Solution:

INCLUDE Irvine32.inc

.data
rows WORD ?
cols WORD ?


.code
    main PROC
        call Clrscr
        mov ecx, 100
        L1:
            call GetMaxXY
            mov rows, ax
            mov cols, dx
          
            movzx eax, rows
            call RandomRange
            mov dh, al

            movzx eax, cols
            call RandomRange
            mov dl, al

            call Gotoxy        ; locate cursor

            mov al,'H'
            call WriteChar

            mov eax,100
            call Delay

        Loop L1

        call WaitMsg
        exit
    main ENDP

END main

Let me know in the comment section if you have any question.

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