com_port || verbose == VerboseMode::nothing) return; com_port->println(number); } void Commander::println(const float number) { if (!com_port || verbose == VerboseMode::nothing) return; com_port->println((float)number, (int)decimal_places); } void Commander::println(const char *...
float myfloat; float sensorCalbrate = 1.117; int x; int y; float z; x = 1; y = x / 2; // y now contains 0, ints can't hold fractions z = (float)x / 2.0; // z now contains .5 (you have to use 2.0, not 2) ※ NOTES AND WARNINGS: If doing math with floats, you...
Arduino Mega also supports: Serial1, Serial2, Serial3 (in place of Serial) Parameters val: a value to send as a single byte str: a string to send as a series of bytes buf: an array to send as a series of bytes len: the length of the buffer Returns bytewrite() will retur...
2、自加)- (自减)+= (复合加)-= (复合减)*= (复合乘)/= (复合除)&= (复合与)|= (复合或)范围HIGH | LOWINPUT | OUTPUTtrue | false整型常量浮点数常量数据类型voidbooleancharunsigned charbyteintunsigned intwordlongunsigned longfloatdoublestringString(c+)array数据类型转换char()byte()int()word...
clear(); // Convert to C-style string before passing to the print() function String tempStr = String(tempCelsius, 1) + "°C"; // 1 decimal place display.print(tempStr.c_str(), SPACING, 0); display.show(); delay(2000); // Wait 2 seconds before taking the next reading } Quick...
Serial.println(stringOne); //using a float and the right decimal places: stringOne = String(5.698, 3); Serial.println(stringOne); //using a float and less decimal places to use rounding: stringOne = String(5.698, 2); Serial.println(stringOne); ...
Serial.println(stringOne); //using a float and the right decimal places: stringOne = String(5.698, 3); Serial.println(stringOne); //using a float and less decimal places to use rounding: stringOne = String(5.698, 2); Serial.println(stringOne); ...
min() #define宏定义 string max() #include 文件包含 String(c++) abs() 算术运算符 array constrain() =赋值 map() +(加) 数据类型转换 pow() -(减) char() sqrt() *(乘) byte() /(除) int() 三角函数 %(取模) word() sin(rad) long() cos(rad) 比较运算符 float() tan(rad) 等于 ...
long Unsigned long short float double array String-chararray String-object 关键字 说明 void void关键字仅用于函数声明。它表示该函数预计不会向调用它的函数返回任何信息。 例子 Void Loop ( ) { // rest of the code } 1. 2. 3. Boolean 布尔值保存两个值之一,true或false。每个布尔变量占用一个字...
intCalculateAltitude(float P, float T) {// Get Altitude from Pressure and Temperaturereturn (int) ((pow(P /101.325,0.190223) -1) * (T *280.4137+128897.8));}void SendAltitudeToDisplay(void) {// Save the response valuesfloat ResponseP, ResponseT;// Send a request in a specific formatcs...