You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.8 KiB
Plaintext
64 lines
1.8 KiB
Plaintext
14 years ago
|
/*
|
||
|
|
Appending to Strings using the += operator and concat()
|
||
|
|
|
||
|
|
Examples of how to append different data types to strings
|
||
|
|
|
||
|
|
created 27 July 2010
|
||
|
|
modified 4 Sep 2010
|
||
|
|
by Tom Igoe
|
||
|
|
|
||
|
|
http://arduino.cc/en/Tutorial/StringAppendOperator
|
||
|
|
|
||
|
|
This example code is in the public domain.
|
||
|
|
*/
|
||
|
|
String stringOne, stringTwo;
|
||
|
|
|
||
|
|
void setup() {
|
||
|
|
Serial.begin(9600);
|
||
|
|
stringOne = String("Sensor ");
|
||
|
|
stringTwo = String("value");
|
||
|
|
Serial.println("\n\nAppending to a string:");
|
||
|
|
}
|
||
|
|
|
||
|
|
void loop() {
|
||
|
|
Serial.println(stringOne); // prints "Sensor "
|
||
|
|
|
||
|
|
// adding a string to a string:
|
||
|
|
stringOne += stringTwo;
|
||
|
|
Serial.println(stringOne); // prints "Sensor value"
|
||
|
|
|
||
|
|
// adding a constant string to a string:
|
||
|
|
stringOne += " for input ";
|
||
|
|
Serial.println(stringOne); // prints "Sensor value for input"
|
||
|
|
|
||
|
|
// adding a constant character to a string:
|
||
|
|
stringOne += 'A';
|
||
|
|
Serial.println(stringOne); // prints "Sensor value for input A"
|
||
|
|
|
||
|
|
// adding a constant integer to a string:
|
||
|
|
stringOne += 0;
|
||
|
|
Serial.println(stringOne); // prints "Sensor value for input A0"
|
||
|
|
|
||
|
|
// adding a constant string to a string:
|
||
|
|
stringOne += ": ";
|
||
|
|
Serial.println(stringOne); // prints "Sensor value for input"
|
||
|
|
|
||
|
|
// adding a variable integer to a string:
|
||
|
|
stringOne += analogRead(A0);
|
||
|
|
Serial.println(stringOne); // prints "Sensor value for input A0: 456" or whatever analogRead(A0) is
|
||
|
|
|
||
|
|
Serial.println("\n\nchanging the Strings' values");
|
||
|
|
stringOne = "A long integer: ";
|
||
|
|
stringTwo = "The millis(): ";
|
||
|
|
|
||
|
|
// adding a constant long integer to a string:
|
||
|
|
stringOne += 123456789;
|
||
|
|
Serial.println(stringOne); // prints "A long integer: 123456789"
|
||
|
|
|
||
|
|
// using concat() to add a long variable to a string:
|
||
|
|
stringTwo.concat(millis());
|
||
|
|
Serial.println(stringTwo); // prints "The millis(): 43534" or whatever the value of the millis() is
|
||
|
|
|
||
|
|
// do nothing while true:
|
||
|
|
while(true);
|
||
|
|
}
|