java - 如何使用扫描仪在给定多个输入的情况下获得多个输出

Question

import java.util.Scanner;

public class TomAndJerry {
    Scanner sc = new Scanner(System.in);

    public String catAndMouse(int x, int y, int z) {
        String result = null;
        int q = 0;
        System.out.println("enter the number of queries");
        q = sc.nextInt();
        for (int i = 0; i < q; i++) {
            x = sc.nextInt();
            y = sc.nextInt();
            z = sc.nextInt();
        }

        if (Math.abs(x - z) < Math.abs(y - z)) {
            result = "Cat A";
        } else if (Math.abs(x - z) > Math.abs(y - z)) {
            result = "Cat B";
        } else {
            result = "Mouse C";
        }
        return result;
    }

    public static void main(String[] args) {
        int x = 0, y = 0, z = 0;
        String result = null;
        TomAndJerry tj = new TomAndJerry();
        result = tj.catAndMouse(x, y, z);
        System.out.println(result);
    }

}

输出:-

 enter the number of queries
                    2
                  1 2 3
                  1 3 2
                 Mouse C

我最终只获得使用扫描仪提供的最后一个查询/输入的输出。我如何获取剩余查询/输入的输出。感谢您提前抽出时间! :)

Answer 1

您需要使用 List 或 String[] 而不是简单的 String 对象来从函数返回多个字符串，另外，if 条件需要成为 for 循环的一部分，并且您需要将结果添加到列表或数组中，下面是使用 List 的预期输出

import java.util.*;

public class Main {
Scanner sc = new Scanner(System.in);

public List<String> catAndMouse(int x, int y, int z) {
    List<String> results = new ArrayList<String>();
    int q = 0;
    System.out.println("enter the number of queries");
    q = sc.nextInt();
    for (int i = 0; i < q; i++) {
        x = sc.nextInt();
        y = sc.nextInt();
        z = sc.nextInt();
        if (Math.abs(x - z) < Math.abs(y - z)) {
             results.add("Cat A");
        } else if (Math.abs(x - z) > Math.abs(y - z)) {
             results.add("Cat B");
        } else {
             results.add("Mouse C");
        }
    }


    return results;
}

public static void main(String[] args) {
    int x = 0, y = 0, z = 0;
    Main tj = new Main();
    List<String> results =  tj.catAndMouse(x, y, z);
    System.out.println(results.toString());
}

}

enter the number of queries 2 1 2 3 1 3 2 [Cat B, Mouse C]