用汇编语言写出体育比赛计时程序,程序运行,屏幕显示00:00:00,并开始按秒计时。每按下一次空格键,在下一行显示当前暂停的时刻,最多可计10次暂停时间。按下Q键,程序退出。实现这个程序的软件是dosbox
时间: 2024-03-17 13:42:56 浏览: 13
好的,这是一个比较有挑战性的问题,但我会尽力回答。以下是参考代码:
```
.model small
.stack 100h
.data
timer db 0
pauseCount db 0
pause db 10 dup('$')
msg1 db 'Press Space to pause and Q to quit', '$'
msg2 db 'Paused time: ', '$'
msg3 db '00:00:00'
count db 0
.code
main proc
mov ax, @data
mov ds, ax
mov ah, 2 ; move cursor to top left corner
mov bh, 0
mov dh, 0
mov dl, 0
int 10h
mov ah, 9 ; display message 1
mov dx, offset msg1
int 21h
mov ah, 9 ; display message 3
mov dx, offset msg3
int 21h
mov ah, 1 ; set up timer interrupt
mov al, 0ch
mov bx, 7 ; set timer rate to 18.2 Hz
int 21h
mov ah, 0 ; wait for key press
int 16h
startTimer:
cmp al, 'q' ; check for exit key
je exitProgram
cmp al, ' ' ; check for pause key
je pauseTimer
inc count ; increment count
cmp count, 18 ; check if 1 second has passed
jne skipUpdate
mov count, 0 ; reset count
inc timer ; increment timer
call updateTimer ; update timer display
skipUpdate:
mov ah, 0 ; wait for key press
int 16h
jmp startTimer
pauseTimer:
cmp pauseCount, 10 ; check if pause limit has been reached
je startTimer
mov ah, 2 ; move cursor to next line
mov bh, 0
mov dl, 0
inc dh
int 10h
mov ah, 9 ; display message 2
mov dx, offset msg2
int 21h
call updatePause ; update pause display
inc pauseCount ; increment pause count
jmp startTimer
exitProgram:
mov ah, 4ch ; exit to DOS
int 21h
main endp
updateTimer proc
push ax bx cx dx
mov ah, 2 ; move cursor to timer display
mov bh, 0
mov dh, 2
mov dl, 0
int 10h
mov al, timer ; convert timer to ASCII
mov cl, 10
div cl ; get minutes
add ah, 30h
add al, 30h
mov dl, ah
mov ah, 2
int 21h
mov dl, al
mov ah, 2
int 21h
mov dl, ':' ; display colon
mov ah, 2
int 21h
mov al, timer ; convert timer to ASCII
and al, 0fh ; get seconds
add al, 30h
mov dl, al
mov ah, 2
int 21h
pop dx cx bx ax
ret
updateTimer endp
updatePause proc
push ax bx cx dx
mov ah, 2 ; move cursor to pause display
mov bh, 0
mov dl, 12
add dl, pauseCount
mov dh, 3
int 10h
mov al, timer ; convert timer to ASCII
mov cl, 10
div cl ; get minutes
add ah, 30h
add al, 30h
mov pause[di], ah ; store minutes
mov pause[di+1], al
mov al, ':' ; store colon
mov pause[di+2], al
mov al, timer ; convert timer to ASCII
and al, 0fh ; get seconds
add al, 30h
mov pause[di+3], al ; store seconds
mov al, '.' ; store decimal point
mov pause[di+4], al
add di, 5 ; increment index
pop dx cx bx ax
ret
updatePause endp
end main
```
这是一个比较基础的计时程序,使用了 DOSBox 中的汇编语言,以秒为单位计时,并支持最多10次暂停。由于 DOSBox 环境的不同,代码可能需要进行适当的修改才能正常运行。
相关推荐
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![application/msword](https://img-home.csdnimg.cn/images/20210720083327.png)
![application/x-rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![application/x-rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![doc](https://img-home.csdnimg.cn/images/20210720083327.png)