Question

    import java.util.Scanner;

public class ATMMachine {
    // Declared global variables.
    public static int IDattempts = 3, pinattempts = 3;
    public static double balance;
    public static String ID = "John Smith", pin = "1234";
    public static int freeze = 0;

    public static void main(String[] args) {
        IDProcedure();
    }

    static Scanner input = new Scanner(System.in);

    // ID Procedure
    public static void IDProcedure() {
        while (freeze == 0) {

            System.out.print("Please enter your ID: ");
            ID = input.nextLine();
            // Ignores case, so if typed in upper/lower , program still works.
            if (ID.equalsIgnoreCase("john smith")) {
                PINProcedure();
            } else {
                IDattempts -= 1;
                System.out.println("You have " + IDattempts + " more tries to enter your correct ID");
            }
            if (IDattempts == 0) {
                System.out.print("You are out of tries, you will be kicked out of the program.");
                System.exit(0);
            }

        }
    }

    // PIMProcedure
    public static void PINProcedure() {
        while (freeze == 0) {

            System.out.print("Please enter your PIN: ");
            pin = input.nextLine();
            if (pin.equals("1234")) {
                System.out.print("You're in!");
                // Here is where you make them see their balance, withdrawal
            } else {
                pinattempts -= 1;
                System.out.println("You have " + pinattempts + " more tries to enter your correct PIN");
                System.exit(0);
            }
        }
    }
}

您好，

所以我正在创建一个类似atm机器的程序，但我现在需要解释的就是我所拥有的。

我有，所以当有人打开程序时，会要求他们输入ID（用户名）和密码（4位数密码）。

一切都很有效，如果您在被要求 ID 时尝试了3次尝试，程序就会终止。

如果您在请求 PIN 时尝试用完，则会终止。有没有办法解决这个问题，我确信这是，我需要社区的帮助！提前致谢。如果您发现更多错误或初学者错误，请通知我，因为我是新人。

Answer 1

仔细查看您的PINProcedure()方法。在IDProcedure()中，你有这个：

if (IDattempts == 0) {
            System.out.print("You are out of tries, you will be kicked out of the program.");
            System.exit(0);
        }

PINProcedure()缺少此条件语句，因此如果输入了错误的PIN，它将达到System.exit(0)，无论剩余多少次尝试。你只需像在IDProcedure()中那样在这里包含条件语句，一切都应该正常工作。

ATM机程序，程序在未编程时终止

1 个答案: