How to implement a 10 second countdown in the CMD command and display 10 9 8 7

static atimer = new ;

static void main(string args)+= new ;

true;static void ontimedevent(object source, e)

for (int a = 10; a >0; a++)

It seems like that's fine

Then run Build and run it under cmd.

echo off

for /l %%a in (10,-1,0) do (echo %%a

for l %%b in (1,1,7000) do (ver >nul) : ver command can be used to time exactly, which means that 7000 ver executions are equivalent to 1 second.

clspause:: This is the program that is executed.

echo off

setlocal enabledelayedexpansionfor /l %%a in (10,-1,1) do (set ss=%%~a

if !ss!lss 10 set ss=0%% acls & echo 00:00:!ss!

ping -n "2">nul

cls & echo bo..o..o..o..o..o..o..o...m...

echo boom ——! A big **, a huge pit on the ground, and a mushroom cloud in the air.

pause

What is this problem, seeking explanation?

@echo off

set delay=5

set p=countdown nul

set /a delay=%delay%-1if %delay% equ 1 goto bgoto a

The commands that becho needs to execute are written here.

pause

private sub form_load()= "10"

trueend sub

private sub timer1_timer()static a as integer

a = cint(

a = a - 1

aif a = -1 then = "10"

end sub

It's not very precise, that's about it.

static is a static variable declaration.

That is, it always has a memory allocation while the program is running and will always have a memory allocation even if the end value of the procedure or function is the same, and the dim is only valid within the function, and when the function completes, the variable memory is released.

Add a timer control on the form with the interval property set to 1000;

Add another label control.

Then enter **:

private sub timer1_timer()static a as integer

if a = 0 then

a = 10

end if

a = a - 1

aend sub

Add a timer control, interval=1000, and then add a label, caption=10.

private sub timer1_timer()-1

ifend if

end sub

Use the "dead" loop: set a time difference, if the difference between the current time and the set time is not greater than the set time difference, the loop will not be exited, so as to achieve the purpose of time delay.

echo off

set /a start=%time:~6,2%:prodelay

set a now=%time: 6,2%set a diff=%now%-%start%rem The following sentence prevents errors when the number of seconds jumps from 59 to 1.

if %diff% leq 2 goto :prodelayecho ok!

The ping command is used to achieve delay, which is ingenious and controllable, but the accuracy is not high.

For example, ping -n 3 >nul can pause for about 2 seconds, and the number after -n is the number of packets sent, plus one for the pause seconds.

The deviation of this method per second is 1 second.

@echo off

set /a s=50+1

ping -n %s% >nul

start "" notepad

pause for 50 seconds and then run the notepad program.

set /a s=50+1

for /l %%i in (1,1,!s!) do (set /a s-=1

ping -n 2 >nul

title The countdown begins!s!)

start "" notepad

pause

Use setinterval to schedule 1 second to execute once each time minus 1 to 0.