“Boolean”的版本间的差异
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<font color="orange" size="+1">'''示例'''</font> | <font color="orange" size="+1">'''示例'''</font> | ||
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int LEDpin = 5; // LED on pin 5 | int LEDpin = 5; // LED on pin 5 | ||
int switchPin = 13; // momentary switch on 13, other side connected to ground | int switchPin = 13; // momentary switch on 13, other side connected to ground | ||
2016年12月26日 (一) 21:01的版本
布尔
一个布尔变量拥有两个值,true或false。(每个布尔变量占用一个字节的内存)
示例
int LEDpin = 5; // LED on pin 5
int switchPin = 13; // momentary switch on 13, other side connected to ground
boolean running = false;
void setup()
{
pinMode(LEDpin, OUTPUT);
pinMode(switchPin, INPUT);
digitalWrite(switchPin, HIGH); // turn on pullup resistor
}
void loop()
{
if (digitalRead(switchPin) == LOW)
{ // switch is pressed - pullup keeps pin high normally
delay(100); // delay to debounce switch
running = !running; // toggle running variable
digitalWrite(LEDpin, running); // indicate via LED
}
}
扩展阅读
- - 常量
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