Uh, indeed.

char* digitPinsOff[4] = {"l", "i", "h", "f"};
char* digitPinsOn[4]  = {"L", "I", "H", "F"};
char* digits[10] = {
  "KGDBAJkgdbaj", "GDgd", "KGEABkgeab", "KGEDBkgedb", "JEGDjegd",
  "KJEDBkjedb", "KJABDEkjabdeH", "KGDkgd", "ABDEJGKabdejgk", "BDEJGEKbdejgk"
};

void setup() {
  for (int i = 2; i < 14; i++) {
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW);
  }
}

void loop() {
  // displays the number 3498.
  // Uh.
  displayDigitAt(1, 3);
  displayDigitAt(2, 4);
  displayDigitAt(3, 9);
  displayDigitAt(4, 8);
}

void displayDigitAt(int pos, int digitToDisplay) {
  parseLetter(digitPinsOff[pos - 1]);
  parseLetter(digits[digitToDisplay]);
  parseLetter(digitPinsOn[pos - 1]);
}


void parseLetter(char* str) {
  int len = strlen(str);
  for (int i = 0; i < len; i++) {
    char pinCode = str[i];
    if (65 <= pinCode && pinCode <= 76) {
      digitalWrite(pinCode - 63, HIGH);
    }
    else {
      digitalWrite(pinCode - 95, LOW);
    }
  }
}