【华为机试068】成绩排序

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/HEYIAMCOMING/article/details/81116442

题目描述：

输入任意（用户，成绩）序列，可以获得成绩从高到低或从低到高的排列,相同成绩
      都按先录入排列在前的规则处理。

   例示：
   jack      70
   peter     96
   Tom       70
   smith     67

   从高到低  成绩            
   peter     96    
   jack      70    
   Tom       70    
   smith     67    

   从低到高

   smith     67  

   Tom       70    
   jack      70    
   peter     96     

Java实现：

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int total = sc.nextInt();
            int type = sc.nextInt();
            Student[] scores = new Student[total];
            for (int i = 0; i < total; i++) {
                String name = sc.next();
                int score = Integer.parseInt(sc.next());
                scores[i] = new Student(name, score);
            }
            if (type == 0) {
                //从大到小
                Arrays.sort(scores, new Comparator<Student>() {
                    @Override
                    public int compare(Student o1, Student o2) {
                        return o2.score - o1.score;
                    }
                });
            } else {
                Arrays.sort(scores, new Comparator<Student>() {
                    @Override
                    public int compare(Student o1, Student o2) {
                        return o1.score - o2.score;
                    }
                });
            }
            for (Student s : scores) {
                System.out.println(s.name + " " + s.score);
            }
        }
    }
}

class Student {
    String name = "";
    int score = 0;
    public Student(String name, int score) {
        this.name = name;
        this.score = score;
    }
}

知识点：

• Arrays.sort可以传入自定义对象的数组和比较器