const char* mots[] = {
  "pomme",
  "poire",
  "tomate",
  "salade"
};
const size_t nombreDeMots = sizeof mots / sizeof * mots;

void setup() {
  Serial.begin(115200);
  for (size_t i = 0; i < nombreDeMots; i++) {
    const char * motEnCours = mots[i];
    Serial.print("codes ASCII de "); Serial.println(motEnCours);
    size_t indice = 0;
    while (motEnCours[indice] != '\0') { // une c-string se termine par un caractère nul
      Serial.print(motEnCours[indice]); Serial.print(" -> "); Serial.println((byte) motEnCours[indice]);
      indice++;
    }
    Serial.println("---------");
  }
}

void loop() {}