pls help with warning

Using Arduino Programming Questions
1

Hey guys.. Im having some trouble uploading this code.. which I will post down below. Its about a morse code translator.

we_were/we_were.ino: In function 'void loop()':
ino:16:53: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence("-......-..--...--......-..--...-")
ino:17:67: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence("-.-.......-..--.--....--.-.......-..--.--....-");
warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence("-.-......--.-...-...--.....--.-......--.-...-...--.....-");
ino:19:85: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence("-.-..-.-----.-.---....-....-...--.-..-.-----.-.---....-....-...-")
ino:20:101: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence("..-..-...-....-...-----.---.--.-...-..-...-..-...-....-...-----.---.--.-...-..-."
we_were/we_were.ino:21:40: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence(".-..---..-..---. ");
ino:22:71: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
morseCodeSequence(".--.--......-.-.-..--.-...--.--......-.-.-..--.-..");
ino: In function 'void morseCodeSequence(char*)':
ino:34:26: warning: NULL used in arithmetic [-Wpointer-arith]
while (sequence *!= NULL) *

  • ^*
    ===code====
    int ledPin = 13;
    //duration of the dot in morse code, this is also the time between the dots and dashes
    int dotDelay = 200;
    *void setup() *
    {

  • // Setup the pin as output*

  • pinMode(ledPin, OUTPUT);*
    }
    *void loop() *
    {
    morseCodeSequence("-......-..--...--......-..--...-");//
    morseCodeSequence("-.-.......-..--.--....--.-.......-..--.--....-");//
    morseCodeSequence("-.-......--.-...-...--.....--.-......--.-...-...--.....-");//
    morseCodeSequence("-.-..-.-----.-.---....-....-...--.-..-.-----.-.---....-....-...-");//
    morseCodeSequence("..-..-...-....-...-----.---.--.-...-..-...-..-...-....-...-----.---.--.-...-..-.");//
    morseCodeSequence(".-..---..-..---. ");//
    morseCodeSequence(".--.--......-.-.-..--.-...--.--......-.-.-..--.-..");//

  • delay(1000); // Wait for 1 second*
    }
    void morseCodeSequence(char* sequence)
    {

  • int i = 0;*

  • // Loop for each element in the array*
    _ while (sequence != NULL) _
    _     {    _
    _ dotOrDash(sequence*); // Send out the dot or dash*
    * i++; // Increment to the next element in the array*
    * }
    delay(dotDelay * 3); // gap between letters_
    _}
    void dotOrDash(char dotOrDash)
    {
     digitalWrite(ledPin, HIGH);
     if (dotOrDash == '.')
     {
     delay(dotDelay);
    }
     else // must be a -
     {
    delay(dotDelay * 3);
    }
     digitalWrite(ledPin, LOW);
    delay(dotDelay); // gap between flashes*
    }_
    we_were.ino (1.47 KB)

2

The "deprecated conversion from string constant to 'char*'" message has been documented many times. YOU can do some research.

ino:34:26: warning: NULL used in arithmetic [-Wpointer-arith]
    while (sequence[i] != NULL)

A NULL and a NULL terminator are NOT the same thing. A NULL terminator is the value 0 (usually expressed as '\0'). A NULL is the address 0. The value 0 and the address 0 are not the same thing.

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