Arduino/build/shared/examples/8.Strings/CharacterAnalysis/CharacterAnalysis.ino

/*
  Character analysis operators 
 
 Examples using the character analysis operators.
 Send any byte and the sketch will tell you about it.
 
 created 29 Nov 2010
 by Tom Igoe
 
 This example code is in the public domain.
 */

void setup() {
  // Open serial communications:
  Serial.begin(9600);

  // send an intro:
  Serial.println("send any byte and I'll tell you everything I can about it");
  Serial.println();
}

void loop() {
  // get any incoming bytes:
  if (Serial.available() > 0) {
    int thisChar = Serial.read();

    // say what was sent:
    Serial.print("You sent me: \'");
    Serial.write(thisChar);
    Serial.print("\'  ASCII Value: ");
    Serial.println(thisChar);

    // analyze what was sent:
    if(isAlphaNumeric(thisChar)) {
      Serial.println("it's alphanumeric");
    }
    if(isAlpha(thisChar)) {
      Serial.println("it's alphabetic");
    }
    if(isAscii(thisChar)) {
      Serial.println("it's ASCII");
    }
    if(isWhitespace(thisChar)) {
      Serial.println("it's whitespace");
    }
    if(isControl(thisChar)) {
      Serial.println("it's a control character");
    }
    if(isDigit(thisChar)) {
      Serial.println("it's a numeric digit");
    }
    if(isGraph(thisChar)) {
      Serial.println("it's a printable character that's not whitespace");
    }
    if(isLowerCase(thisChar)) {
      Serial.println("it's lower case");
    }
    if(isPrintable(thisChar)) {
      Serial.println("it's printable");
    }
    if(isPunct(thisChar)) {
      Serial.println("it's punctuation");
    }
    if(isSpace(thisChar)) {
      Serial.println("it's a space character");
    }
    if(isUpperCase(thisChar)) {
      Serial.println("it's upper case");
    }
    if (isHexadecimalDigit(thisChar)) {
      Serial.println("it's a valid hexadecimaldigit (i.e. 0 - 9, a - F, or A - F)");
    }

    // add some space and ask for another byte:
    Serial.println();
    Serial.println("Give me another byte:");
    Serial.println();
  }
}