Arduino示例代码讲解：String substring() 字符串子链

String substring() 字符串子链

这段代码是一个Arduino示例程序，用于演示如何使用String类的substring()方法来从字符串中提取子字符串。

/*String substring()Examples of how to use substring in a Stringcreated 27 July 2010,modified 2 Apr 2012by Zach Evelandhttp://arduino.cc/en/Tutorial/StringSubstringThis example code is in the public domain.*/void setup() {// Open serial communications and wait for port to open:Serial.begin(9600);while (!Serial) {; // wait for serial port to connect. Needed for Leonardo only}// send an intro:Serial.println("\n\nString  substring():");Serial.println();
}void loop() {// Set up a String:String stringOne = "Content-Type: text/html";Serial.println(stringOne);