Question

我需要根据用户输入来重复执行此Java代码，并且无法使用到目前为止的代码来重复执行该Java代码。我不应该使用除扫描仪以外的任何其他导入，并使用main类。这是因为我们使用https://repl.it/languages/java10作为编译器，因为我们是基本类。当我运行代码时，应该询问十个随机加减法，并询问用户是否要继续。输入1以继续时，它应该再问十个问题。但是，运行此代码后，它将在第一个问题之后停止。

import java.util.Scanner;
class Main {
  public static void main(String[] args) {
    System.out.println("Answer the following questions.");
    Scanner in = new Scanner(System.in);
    int A = 0;
    int N = 10;
    int n = 0;
    int H = 0;
    boolean p = true;
        while (p){
        int R1 = (int)(Math.random() * 50 + 1);
        int R2 = (int)(Math.random() * 999 + 1);
        int R3 = (int)(Math.random() * 999 + 1);
          if(R1>25){
          System.out.println( "" + R2 + " + " + R3);
          A = in.nextInt();
            if (A == (R2 + R3))
              System.out.println("Correct");
            else 
              System.out.println("Incorrect");
        }
          if(R1<25){
            System.out.println( "" + R2 + " - " +  R3);
           A = in.nextInt();
            if (A == (R2 - R3))
              System.out.println("Correct");
            else 
              System.out.println("Incorrect");}
        N--;
        if (N==0)
        p = false;
        continue;
        }System.out.println("Do you want ot continue? Put 1 for yes, 2 for no.");
        H = in.nextInt();
        if (H==1)
        p=true;
        else
        p=false;
      while (N>0);
  }
    }

Answer 1

这就是为什么您将问题System.out.println("Do you want ot continue? Put 1 for yes, 2 for no.");放在while中。我建议使用do while而不是while。因此，您只需要将问题放入循环do while内即可。

        System.out.println("Answer the following questions.");
        Scanner in = new Scanner(System.in);
        int A = 0;
        int N = 10;
        int H = 0;
        boolean p = true;
        do{
            int R1 = (int) (Math.random() * 50 + 1);
            int R2 = (int) (Math.random() * 999 + 1);
            int R3 = (int) (Math.random() * 999 + 1);
            if (R1 > 25) {
                System.out.println("" + R2 + " + " + R3);
                A = in.nextInt();
                if (A == (R2 + R3)) {
                    System.out.println("Correct");
                } else {
                    System.out.println("Incorrect");
                }
            }
            if (R1 < 25) {
                System.out.println("" + R2 + " - " + R3);
                A = in.nextInt();
                if (A == (R2 - R3)) {
                    System.out.println("Correct");
                } else {
                    System.out.println("Incorrect");
                }
            }
            N--;

            System.out.println("Do you want ot continue? Put 1 for yes, 2 for no.");
            H = in.nextInt();
            if (H == 1) {
                p = true;
            } else {
                p = false;
            }
            if (N == 0) {
                p = false;
                System.out.println("You have reached your max attempts.")
            }
        }while (N > 0 && p);

我需要根据用户输入重复执行此Java代码，但无法使用到目前为止的代码重复进行操作

1 个答案: