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64 lines
1.8 KiB
Plaintext
64 lines
1.8 KiB
Plaintext
/*
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Appending to Strings using the += operator and concat()
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Examples of how to append different data types to strings
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created 27 July 2010
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modified 4 Sep 2010
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by Tom Igoe
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http://arduino.cc/en/Tutorial/StringAppendOperator
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This example code is in the public domain.
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*/
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String stringOne, stringTwo;
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void setup() {
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Serial.begin(9600);
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stringOne = String("Sensor ");
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stringTwo = String("value");
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Serial.println("\n\nAppending to a string:");
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}
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void loop() {
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Serial.println(stringOne); // prints "Sensor "
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// adding a string to a string:
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stringOne += stringTwo;
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Serial.println(stringOne); // prints "Sensor value"
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// adding a constant string to a string:
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stringOne += " for input ";
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Serial.println(stringOne); // prints "Sensor value for input"
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// adding a constant character to a string:
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stringOne += 'A';
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Serial.println(stringOne); // prints "Sensor value for input A"
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// adding a constant integer to a string:
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stringOne += 0;
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Serial.println(stringOne); // prints "Sensor value for input A0"
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// adding a constant string to a string:
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stringOne += ": ";
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Serial.println(stringOne); // prints "Sensor value for input"
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// adding a variable integer to a string:
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stringOne += analogRead(A0);
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Serial.println(stringOne); // prints "Sensor value for input A0: 456" or whatever analogRead(A0) is
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Serial.println("\n\nchanging the Strings' values");
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stringOne = "A long integer: ";
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stringTwo = "The millis(): ";
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// adding a constant long integer to a string:
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stringOne += 123456789;
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Serial.println(stringOne); // prints "A long integer: 123456789"
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// using concat() to add a long variable to a string:
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stringTwo.concat(millis());
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Serial.println(stringTwo); // prints "The millis(): 43534" or whatever the value of the millis() is
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// do nothing while true:
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while(true);
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} |