Python用time,设计程序,显示20秒倒计时Python用time,设计程序,显示20秒倒计？

回答会自动过滤缩进，需要按照上图调整语法缩进，下方是代码

import time

# 设置倒计时时间（单位：秒）

countdown_time = 20

# 开始循环

while countdown_time >0:

# 打印当前倒计时时间

print(countdown_time)

# 等待 1 秒

time.sleep(1)

# 倒计时时间减 1

countdown_time -= 1

# 倒计时结束

print("倒计时结束！")

Dim Ts As Integer, Tm As Integer, Th As Integer

Dim StartT As Boolean

Private Sub Command1_Click()

If StartT = False Then

Command1.Caption = "暂停时间"

Else

Command1.Caption = "启动时间"

End If

StartT = Not StartT

End Sub

Private Sub Command2_Click()

StartT = False

Command1.Caption = "启动时间"

Ts = 0

Tm = 0

Th = 0

End Sub

Private Sub Command3_Click()

Th = Val(InputBox("输入小时"))

Tm = Val(InputBox("输入分钟"))

Ts = Val(InputBox("输入秒"))

End Sub

Private Sub Form_Load()

Command1.Caption = "启动时间"

Command2.Caption = "停止"

Command3.Caption = "设置时间"

Label1.Caption = "0:00:00"

Timer1.Enabled = True

Timer1.Interval = 1000

Ts = 0

Tm = 0

Th = 0

StartT = False

End Sub

Private Sub Timer1_Timer()

If StartT = True Then

Ts = Ts - 1

If Ts = -1 Then

Ts = 59

Tm = Tm - 1

If Tm = -1 Then

Tm = 59

Th = Th - 1

End If

End If

If Th = 0 And Tm = 0 And Ts = 0 Then

StartT = False

End If

End If

Label1.Caption = Th &":" &Format(Tm, "00") &":" &Format(Ts, "00")

End Sub

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