This better describes what the for-loop syntax is doing. See "how to increment by two" for more on the iterator statement. Arduino Loop Counter Control Variable The other important point about for-loops is that they need a loop control variable - in the example this is the variable 'i' ...
大括号用来将程式代码分成一个又一个的区块,如以下范例所示,在loop()函数的前、后,必须用大括号括起来。 范例:void loop(){Serial.pritln("cial");}程式的注释就是对代码的解释和说明,编写注释有助于程式设计师(或其他人)了解代码的功能。Arduino处理器在对程式码进行编译时会忽略注释的部份。Arduino 语言中...
这些不寻常的 for 语句可能会解决一些困难的编程问题。 例如,在增量计数中使用乘法可以得到一个等比数列: for(intx=2;x<100;x=x*1.5){ println(x); }5 生成:2,3,4,6,9,13,19,28,42,63,94 另一个例子,使用 for循环使 LED产生渐亮渐灭的效果: voidloop() { intx=1; for(inti=0;i>-1;i=...
int numbers[5]; int moreNumbers[5] = {1,2,3,4,5}; void setup() { // put your setup code here, to run once: Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: for(int i = 0; i < 5; i++){ Serial.println(numbers[i]); } for(int ...
语法(Syntax): stream.setTimeout(time) time:毫秒为单位的时间,长整型(long) Serial类 Serial 类 用于对串口数据流的读写。 Serial 继承 Stream 类,同时增加了几个新的函数,所有方法如下: if (Serial) available() availableForWrite() begin()
Syntax语法 x += y; // 等价于 x = x + y; x -= y; // 等价于 x = x - y; x *= y; // 等价于 x = x * y; x /= y; // 等价于 x = x / y; Parameters参数 x:任何变量类型 y:任何变量类型或常数 Examples范例 x = 2; ...
Syntax tone(pin, frequency) tone(pin, frequency, duration) Parameters pin: the pin on which to generatethe tone frequency: the frequency of the tone in hertz – unsigned int duration: the duration of the tone in milliseconds (optional1) – unsigned long ...
例如,在增量计数中使用乘法可以得到一个等比数列: for(int x = 2; x < 100; x = x * 1.5){ println(x); } 生成:2,3,4,6,9,13,19,28,42,63,94 另一个例子,使用 for 循环使 LED 产生渐亮渐灭的效果: void loop() { int x = 1; for (int i = 0; i > -1; i = i + x){ ...
Syntaxtone(pin, frequency) tone(pin, frequency, duration)Parameterspin: the pin on which to generatethe tone frequency: the frequency of the tone in hertz - unsigned int duration: the duration of the tone in milliseconds (optional) - unsigned long ...
The += (et al) operators are just a convenient shorthand for the expanded syntax, listed below.对一个变量和另一个参数或变量完成一个数学运算。+二(以及其他) 可以缩短语法长度。Syntax语法X += y;返回变量原始值或增加/消耗后的新值。Examples 范例X = 2;y = +x;乱数函式 产生乱数randomSeed(...