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String [] (accès à un élément)
Description
Accéder à un caractère particulier d'un objet String. Identique à charAt()
Syntaxe
char monChar = string[n]
Paramètres
- Char monChar une variable char appelée monChar
- string: une variable de type String()
- n: emplacement du caractère à lire (type int)
※ Remarque:
le n-ième, caractère de la chaîne de l'objet 'string'''.
Exemple
void setup() {
Serial.begin(9600);
Serial.println("\n\nString charAt() and setCharAt():");
}
void loop() {
// make a string to report a sensor reading:
String reportString = "SensorReading: 456";
Serial.println(reportString);
// the reading's most significant digit is at position 15 in the reportString:
String mostSignificantDigit = reportString.charAt(15);
Serial.println("Most significant digit of the sensor reading is: " + mostSignificantDigit);
// add blank space:
Serial.println();
// you can alo set the character of a string. Change the : to a = character
reportString.setCharAt(13, '=');
Serial.println(reportString);
// do nothing while true:
while (true);
}
※ ARDUINO BUY RECOMMENDATION
| Arduino UNO R3 | |
| Arduino Starter Kit |
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