利用汇编语言实现一个可以在显示器上显示秒、毫秒信息的电子秒表。直接给出基于 MASM 编译器的汇编代码
时间: 2024-03-04 19:49:27 浏览: 110
好的,以下是一个基于 MASM 编译器的汇编代码,可以实现在显示器上显示秒、毫秒信息的电子秒表:
```
; 汇编语言实现电子秒表
; 作者:AI助手
.386
.model flat,stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib
.const
TIMER_ID equ 1
TIMER_INTERVAL equ 10
BUFFER_SIZE equ 16
.data
hInstance HINSTANCE ?
hWnd HWND ?
hTimer HANDLE ?
dwStartTime DWORD ?
dwCurrentTime DWORD ?
szBuffer db BUFFER_SIZE dup(?)
.code
start:
invoke GetModuleHandle, NULL
mov hInstance, eax
invoke InitCommonControls
mov wc.style, CS_HREDRAW or CS_VREDRAW
mov wc.lpfnWndProc, OFFSET WndProc
mov wc.cbClsExtra, NULL
mov wc.cbWndExtra, NULL
push hInstance
pop wc.hInstance
mov wc.hbrBackground, COLOR_BTNFACE+1
mov wc.lpszMenuName, NULL
mov wc.lpszClassName, OFFSET szClassName
invoke RegisterClass, addr wc
invoke CreateWindowEx, WS_EX_CLIENTEDGE, OFFSET szClassName, OFFSET szTitleName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 320, 240, NULL, NULL, hInstance, NULL
mov hWnd, eax
invoke SetTimer, hWnd, TIMER_ID, TIMER_INTERVAL, NULL
invoke ShowWindow, hWnd, SW_SHOWDEFAULT
invoke UpdateWindow, hWnd
invoke GetMessage, addr msg, NULL, 0, 0
cmp eax, 0
je exit
cmp eax, -1
je exit
invoke TranslateMessage, addr msg
invoke DispatchMessage, addr msg
jmp start
exit:
invoke KillTimer, hWnd, TIMER_ID
invoke ExitProcess, NULL
WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
cmp uMsg, WM_CREATE
je OnCreate
cmp uMsg, WM_TIMER
je OnTimer
cmp uMsg, WM_PAINT
je OnPaint
cmp uMsg, WM_KEYDOWN
je OnKeyDown
cmp uMsg, WM_DESTROY
je OnDestroy
jmp DefWindowProc
ret
OnCreate:
invoke GetTickCount
mov dwStartTime, eax
ret
OnTimer:
invoke GetTickCount
mov dwCurrentTime, eax
sub dwCurrentTime, dwStartTime
mov eax, dwCurrentTime
cdq
mov ebx, 1000
div ebx
mov ecx, eax
mov eax, dwCurrentTime
mov ebx, 1000
div ebx
sub eax, ecx * 1000
mov edx, eax
mov eax, ecx
invoke wsprintf, addr szBuffer, OFFSET szFormat, eax, edx
invoke InvalidateRect, hWnd, NULL, TRUE
ret
OnPaint:
invoke BeginPaint, hWnd, addr ps
invoke TextOut, ps.hdc, 10, 10, addr szBuffer, BUFFER_SIZE
invoke EndPaint, hWnd, addr ps
ret
OnKeyDown:
cmp wParam, VK_ESCAPE
je OnEscape
ret
OnDestroy:
invoke PostQuitMessage, NULL
ret
OnEscape:
invoke SendMessage, hWnd, WM_CLOSE, NULL, NULL
ret
WndProc endp
szClassName db "MyWindowClass", 0
szTitleName db "My Window Title", 0
szFormat db "%d.%03d", 0
wc WNDCLASS <?>
msg MSG <>
ps PAINTSTRUCT <>
end start
```
以上代码使用了 Windows API 中的一些函数和消息来实现秒表的计时和显示,具体实现细节可以参考代码注释。需要注意的是,由于 Windows 系统的特殊性,此代码只能在 Windows 系统上使用 MASM 编译器进行编译和运行。
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