while 循环后的代码不接受输入 [Java]

Question

所以，在这个程序中，当 while 循环结束时，它会正确显示“You Win！”它确实执行了询问用户是否要查看积分的代码。但是，在问题之后不接受输入，并且程序在不接受任何输入的情况下结束。

Scanner scan = new Scanner(System.in);

        System.out.println("Would you like to play a game called Threes? Y/N");
        String answer = scan.nextLine();        //Simple yes or no

        if (answer.contains("Y") || (answer.contains("y"))) {
            System.out.println("OK, want to know how it works? Y/N");
            String answer2 = scan.nextLine();
            if (answer2.contains("n") || (answer2.contains("N"))) {
                System.out.println("OK, Enter a single number.");

                int mistake = 0;    //Used as a counter for number of division mistakes made
                int numstart = scan.nextInt();  //First number input
                int current = numstart;     //Current number displayed - starts as the first number

                System.out.println("Enter 1 or -1 if you're adding or subtracting, and 0 to divide.");
                System.out.println(numstart);       //Displays first number input
                int input = scan.nextInt();     //First function performed by user

                while (current != 1) {      //The game will run until the number '1' is reached
                    if (input == 1) {       //If '1' is input, add one to the number, and display new number
                        current++;
                        System.out.println(current);
                        input = scan.nextInt();
                    }
                    if (input == -1) {      //If '-1' is input, subtract one from the number, and display new number
                        current--;
                        System.out.println(current);
                        input = scan.nextInt();
                    }
                    if (input == 0) {       //If '0' is input, try to divide
                        if (current % 3 != 0 && current != 1) {     //If you can't divide by three, try again
                            System.out.println("Try again.");
                            mistake++;
                            input = scan.nextInt();
                        }
                        if (current % 3 == 0) {     //If you can divide, do it and display new number
                            current = current / 3;
                            System.out.println(current);
                            input = scan.nextInt();
                        }
                    }
                    if (input == 69 || input == 666)     //Cheat code! If you input 69 or 666, you automatically win
                        break;
                    if (((input > 1) && (input != 69) && (input != 666)) || input < -1) {        //If input is not valid, try again and display error
                        System.out.println("Error - wrong input.");
                        input = scan.nextInt();
                    }
                }
                System.out.println("You Win! Mistakes: " + mistake + "\n");        //Will display a win condition, and amount of division errors
                System.out.println("Thank you for playing Threes \n - Chris Burbach");
            }
            System.out.println("Credits? Y/N");
            String credits = scan.nextLine();

            if(credits.contains("Y")||credits.contains("y"))
            {
                System.out.println("\n***********************************************************************");
                System.out.println("*Threes: a game of dividing by three - inspired by my boredom in class*");
                System.out.println("***********************************************************************");

Answer 1

抱歉有任何混淆，我想通了。在“You Win！”的每个实例之后，在其嵌套的 if 语句之外，我需要添加scan.nextLine();，因为它返回一个换行符并由于输入为空而终止程序。