三个按键控制八个流水灯亮灭的程序

要编写一个简单的程序，使用三个按键控制八个流水灯（LED）的亮灭，我们可以假设每个按键对应两个相邻的灯泡，通过轮流点亮和熄灭这两个灯泡来实现。这里是一个基本的Python示例，我们使用GPIO库在Raspberry Pi上实现：

import RPi.GPIO as GPIO
import time

# 定义灯泡列表和按键
lights = [7, 8, 9, 10, 11, 12, 13, 15]  # GPIO pin numbers for lights
buttons = [4, 17, 27]  # GPIO pins for buttons
GPIO.setmode(GPIO.BCM)

def setup():
    GPIO.setup(lights, GPIO.OUT)
    GPIO.setup(buttons, GPIO.IN, pull_up_down=GPIO.PUD_UP)

def light_cycle(i):
    GPIO.output(lights[i], GPIO.HIGH)  # Turn on the light
    time.sleep(0.5)  # Short delay
    GPIO.output(lights[i], GPIO.LOW)  # Turn off the light

def button_handler(pin):
    if GPIO.input(pin) == False:  # Button is pressed
        index = buttons.index(pin)
        light_cycle(index * 2)  # Switch on/off every two lights
        light_cycle(index * 2 + 1)

def main():
    setup()
    while True:
        for button in buttons:
            button_handler(button)
        time.sleep(0.1)  # Small delay to debounce the buttons

if __name__ == "__main__":
    try:
        main()
    except KeyboardInterrupt:
        GPIO.cleanup()  # Clean up GPIO pins when interrupted

在这个程序中，`setup()`函数初始化GPIO，并设置按键为输入模式、灯泡为输出。`light_cycle(i)`函数负责开关指定位置的灯，`button_handler(pin)`则监听按键，当按下时切换相应范围内的灯。`main()`函数持续监控按键并响应。