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Arduino/build/shared/examples/08.Strings/StringStartsWithEndsWith/StringStartsWithEndsWith.ino

56 lines
1.4 KiB
C++

/*
String startWith() and endsWith()
Examples of how to use startsWith() and endsWith() in a String
created 27 July 2010
modified 2 Apr 2012
by Tom Igoe
http://arduino.cc/en/Tutorial/StringStartsWithEndsWith
This 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 startsWith() and endsWith():");
Serial.println();
}
void loop() {
// startsWith() checks to see if a String starts with a particular substring:
String stringOne = "HTTP/1.1 200 OK";
Serial.println(stringOne);
if (stringOne.startsWith("HTTP/1.1")) {
Serial.println("Server's using http version 1.1");
}
// you can also look for startsWith() at an offset position in the string:
stringOne = "HTTP/1.1 200 OK";
if (stringOne.startsWith("200 OK", 9)) {
Serial.println("Got an OK from the server");
}
// endsWith() checks to see if a String ends with a particular character:
String sensorReading = "sensor = ";
sensorReading += analogRead(A0);
Serial.print (sensorReading);
if (sensorReading.endsWith("0")) {
Serial.println(". This reading is divisible by ten");
}
else {
Serial.println(". This reading is not divisible by ten");
}
// do nothing while true:
while (true);
}