Problems with int errors

Projects General Guidance
17

try this code and look at the Serial monitor (115200 bauds)

const byte happyFace[8][8] = {
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 1, 0, 0, 1, 0, 0},
  {0, 0, 1, 0, 0, 1, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 1, 0, 0, 0, 0, 1, 0},
  {0, 0, 1, 1, 1, 1, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0},
};

const byte sadFace[8][8] = {
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 1, 0, 0, 1, 0, 0},
  {0, 0, 1, 0, 0, 1, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 1, 1, 1, 1, 0, 0},
  {0, 1, 0, 0, 0, 0, 1, 0},
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0},
};

const byte (*displayEmoji)[8] ;


const byte sadFaceCompact[8] = {
  0b00000000,
  0b00100100,
  0b00100100,
  0b00000000,
  0b00111100,
  0b01000010,
  0b00000000,
  0b00000000,
};

const byte *displayEmojiCompact;


void printDisplayEmoji() {
  for (byte i = 0; i < 8; i++) {
    Serial.write('{');
    for (byte j = 0; j < 8; j++) {
      Serial.print(displayEmoji[i][j]);
      Serial.write((j < 7) ? ',' : '}');
    }
    Serial.println();
  }
}

void printDisplayEmojiCompact() {
  for (byte i = 0; i < 8; i++) {
    Serial.write('{');
    for (char j = 7; j >= 0; j--) {
      Serial.print(bitRead(displayEmojiCompact[i], j));
      Serial.write((j != 0) ? ',' : '}');
    }
    Serial.println();
  }
}

void setup() {
  Serial.begin(115200); Serial.println();
  displayEmoji = happyFace;
  printDisplayEmoji();
  Serial.println();
  displayEmoji = sadFace;
  printDisplayEmoji();
  Serial.println();
  
  displayEmojiCompact = sadFaceCompact;
  printDisplayEmojiCompact();
}

void loop() {
}