Question

当我输入这段代码时，它会给我一个回报，一旦我第一次使用yes，就名称而言，它会为所有这些使用该回报，例如：如果我说我的名字是Justin，我说那是＆＃34;是＆＃34;是的，然后说我输错了我的年龄，那么它不会给我一个改变它的机会，它会说＆＃34;太棒了！＆＃34;。我该如何解决？我在9年级，所以我不太了解编程，对于noob问题感到抱歉。提前谢谢！

import java.util.Scanner;
public class helloworld_main {
private static Scanner scan;

public static void main(String args[])
{

    scan = new Scanner(System.in);
    String name, age, year, yes, no, no1, no2;

    System.out.print("Please enter your name --> "); // user prompt
    name = scan.nextLine();

    System.out.print("Please enter your age --> "); // user prompt
    age = scan.nextLine();

    System.out.print("Please enter the year you were born --> "); // user prompt
    year = scan.nextLine();


    // Their Name
    System.out.println("So your name is... " + name + ". Right?"); // correction if name is not correct
    yes = scan.nextLine();

        if ("Yes".equals(yes)) 
        {
                System.out.println("Great!");
         } else {
                    System.out.println("Oh. Please retype it.");
                    no = scan.nextLine();
    System.out.println("Hello, " + no);
         }

        // The Age
    System.out.println("The age you entered is..." + age + ". Right?");

        if ("Yes".equals(yes))
        {
            System.out.println("Great!");
        } else {
                System.out.println("OK. Please reenter your age.");
                no1 = scan.nextLine();
        System.out.println("OK, I love " + no1 + " year olds!");
        }

        // Year Born
    System.out.println("The year you were born is... " + year + ". Right?");

        if ("Yes".equals(yes))
        {
            System.out.println("Fantastic!");
        } else {
                System.out.println("Ok then, please tell me what year you were born again.");
                no2 = scan.nextLine();
        System.out.println("Cool! I know someone else born in " + no2);
        }
    scan.close();

}

}

Answer 1

再次提示后，您需要再次阅读用户输入。添加：

yes = scan.nextLine();

后：

System.out.println("The age you entered is..." + age + ". Right?");

和

System.out.println("The year you were born is... " + year + ". Right?");

使用多个if else语句以及它们循环的原因？

1 个答案: