题目4 EXCEL排序

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;
 
public class Main{
    private static class stu{
        String num;
        String name;
        int score;
        @Override
        public String toString() {
            return num+" "+name+" "+score;
        }
    }
    private static class C1 implements Comparator<stu>{
        @Override
        public int compare(stu o1, stu o2) {
            return o1.num.compareTo(o2.num);
        }
    }
    private static class C2 implements Comparator<stu>{
        @Override
        public int compare(stu o1, stu o2) {
            if(o1.name.compareTo(o2.name)!=0)
                return o1.name.compareTo(o2.name);
            else
                return o1.num.compareTo(o2.num);
        }
    }
    private static class C3 implements Comparator<stu>{
        @Override
        public int compare(stu o1, stu o2) {
            if(o1.score>o2.score) return 1;
            else if(o1.score<o2.score) return -1;
            else return o1.num.compareTo(o2.num);
        }
    }
     
    public static void main(String[]args){
        stu[] student=new stu[100000];
        for(int i=0;i<100000;i++)
            student[i]=new stu();
        Scanner in=new Scanner(System.in);
        int count=0;
        while(in.hasNext()){
            int N=in.nextInt();
            int C=in.nextInt();
            if(N==0) break;
            for(int i=0;i<N;i++){
                student[i].num=in.next();
                student[i].name=in.next();
                student[i].score=in.nextInt();
            }
            switch (C) {
            case 1:
                C1 c1=new C1();
                Arrays.sort(student,0,N,c1);//0表示第一个下标，N表示最后一个下标+1
                break;
            case 2:
                C2 c2=new C2();
                Arrays.sort(student,0,N,c2);
                break;
            case 3:
                C3 c3=new C3();
                Arrays.sort(student,0,N,c3);
                break;
            default:
                break;
            }
            count++;
            System.out.println("Case "+count+":");
            for(int i=0;i<N;i++)
                System.out.println(student[i]);
        }
    }
}
/**************************************************************
    Problem: 1023
    User: 0000H
    Language: Java
    Result: Time Limit Exceed
****************************************************************/