Random Generator Guessing Game (Refresh))

//Program uses time function to seed random number generator
//and then generates random number
#include <cstdlib>
#include <ctime>
#include <iostream>
using namespace std;

int main()
{
    srand((unsigned)time(NULL));
    int d = rand()%12;
    cout << d;
    system("cls");

    play:
    int guess;
    cout << "Guess the random generated number: ";
    cin >> guess;

    if(guess == d)
    {
             cout << "You were right!" << d << "was right" << endl;

             }
             else
             {
                 cout << "that was wrong try again" << endl;
                 system("pause");
                 goto play;
                 }

    return 0;
}