Bull/Cow Game C++ v1

#include <iostream>
#include <string>

using namespace std;

int main(int number)
{
    //Introduce the game
    constexpr int WordLength = 5;
    cout << "Welcome to Bulls and Cows!" << endl;
    cout << "Can you guess the word I'm thinking of?..  It's a ";
    cout << WordLength;
    cout << " letter word" << endl;
    //get a guess from the player
    cout << "Your guess: ";
    string Guess;
    cin >> Guess;
    //repeat guess back to player
    cout << "You guessed: ";
    cout << Guess << endl;
    return 0;
}