I am learning java and am making a hangman game but this one line seems to just be ignored and not ran. if i put the same bit of code further up then it is ran, it just isn't ran while its its the while loop. (the "char guess = reader.nextLine().charAt(0);" isn't ran and no input is requested). edit: i have added a reader.nextLine(); after the int input but it still doesnt work.
error:
Exception in thread "main" java.util.NoSuchElementException: No line found
    at java.util.Scanner.nextLine(Unknown Source)
    at test.Testtt.main(Testtt.java:30)
code:
public class Testtt {
    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        print("Would you like to play singleplayer or multiplayer (s/m)? ");
        String mode = reader.nextLine();
        print("How many game would you like to play?");
        int game_num = reader.nextInt();
        reader.nextLine();
        int score = 0;
        for(int x = 0; x < game_num; x++) {
            String word = get_word(mode);
            String temp = get_temp(word);
            int lives = 6;
            String[] guesses = new String[26];
            while(lives > 0) {
                print("Enter letter");
                char guess = reader.nextLine().charAt(0);
                temp = update_temp(temp, word, guess);
                if(win_check(temp, word)) {
                    score = score + 1;
                    break;
                }
                else {
                    lives = lives - 1;
                    display(lives);
                }
            }
        }
    }
