Is there a way to clear empty array in c++ , check code below for explanation

generated = (rand() % 11);

cout << "GUESS THE NUMBER 10 TIMES" << endl;
for (int i = 0; i < 10; i++) {
  cin >> guesses[i];

  if (generated == guesses[i]) {
    cout << "CONGRATS ! YOU HAVE FOUND THE CORRECT NUMBER ! " << generated << endl;
    restart();
    break;
  }
}
cout << "HERE ARE YOUR GUESSES:" << endl;
for (int k = 0; k < 10; k++) {
  cout << guesses[k] << endl;
}

If the array isn't filled up, the output gives me the guessed values and then in the empty slots are random numbers. Is there a way to clear or delete the untouched slots?