hangman unfinished

hangman.cpp

#include <iostream>
#include <string>
#include <ctime>

using namespace std;

const string words[7] = {
    "China",    "Russia", "Switzerland", "Liechtenstein",
    "Thailand", "Japan",  "Canada",
};
const int lives = 5;

int generateRandomNumber() {
  srand((int)time(0));
  return (rand() % 6);
}

string returnString(int num) {
  string str = "";
  for (int i = 0; i < num; i++) {
    str += '*';
  }
  return str;
}

void checkGuess(string input, string chosenWord, string wordToGuess) {
  cout << chosenWord.compare(input) << endl;
}

void startGame() {
  const string chosenWord = words[generateRandomNumber()];
  string wordToGuess = chosenWord[0] + returnString(chosenWord.length() - 1);
  cout << " Starting game... " << endl
       << " Your word is " << chosenWord.length() << " letters long. " << endl
       << " This is your word: " << endl
       << wordToGuess << endl
       << " You have 5 tries. Good luck! " << endl
       << " Enter a letter: ";
  string input;
  getline(cin, input);
  checkGuess(input, chosenWord, wordToGuess);
}

int main() {
  cout << " Hangman - A Command Line Game " << endl
       << " Your topic - Countries " << endl;
  startGame();
  return 0;
}