Камень, ножницы, бумага

#include <iostream>
#include <cstdlib>
#include <string>
#include <ctime>
using namespace std;
string check_user_input() {
    string user_answer;
    int i = 0;
    while (i != 1) {
    cin >> user_answer;
  if (user_answer == "Skissor" || user_answer == "Paper" || user_answer == "Stone"){
    i = 1;
  }
  else if (user_answer == "Quit" ) {
    exit(0);
  }
  else {
    cout << "Wrong answer" << endl << "Make a move ";
  }
}
return user_answer;
}


string generate_computer_answer() {
  string computer_answer;
  int n;
  srand(time(0));
  n = 1 + (rand() % 3);
  if (n == 1) {
    computer_answer = "Skissor";
  }
  else if (n == 2) {
    computer_answer = "Paper";
  }
  else {
    computer_answer = "Stone";
  }
  return computer_answer;
}


int play(string user_answer, string computer_answer, int &user_score, int &computer_score) {
  if((user_answer == "Skissor" && computer_answer == "Paper") || (user_answer == "Paper" && computer_answer == "Stone") || (user_answer == "Stone" && computer_answer == "Skissor")) {
    cout << "User win" << endl;
    user_score = user_score + 1;
    }
    else if((user_answer == "Skissor" && computer_answer == "Stone") || (user_answer == "Paper" && computer_answer == "Skissor") || (user_answer == "Stone" && computer_answer == "Paper")) {
        cout << "Computer win" << endl;
        computer_score = computer_score + 1;
    }
    else {
        cout << "Draw" << endl;
    }
    return user_score, computer_score;
 }

int main() {
  int user_score = 0;
  int computer_score = 0;
  int a;
  string user_answer;
  string computer_answer;

  while (user_answer != "Quit") {

  cout << "Make a move ";
  user_answer = check_user_input();
  computer_answer = generate_computer_answer();
  play(user_answer, computer_answer, user_score, computer_score);
  cout << endl;
  cout << "          Score table:" << endl << "User scores        " << "Computer scores" << endl << user_score << "                  " << computer_score << endl;

}
return 0;
}