JAVA---输入学生个数，输入学生成绩，求最高分和等级，成绩>=最高分-10，等级为A；成绩>=最高分-20，等级为B;成绩>=最高分-30，等级为C；其余等级为D

package lll;

import java.util.Scanner;
public class Test {
	public static void main(String[] args) {
		System.out.print("请输入学生个数：");
		Scanner scan=new Scanner(System.in);
		int num=scan.nextInt();
		int[] scores=new int[num];
		System.out.println("请输入"+num+"个成绩");
		int maxa=0;
		for(int i=0;i<num;i++){
			scores[i]=scan.nextInt();
			if(scores[i]>maxa){
				maxa=scores[i];
			}
		}
		System.out.println("最高分是："+maxa);
		for(int i=0;i<num;i++){
			if(scores[i]>=(maxa-10)){
				System.out.println("student "+i+" score is "+scores[i]+"\tgrade is A");
			}
			else if(scores[i]>=(maxa-20)){
				System.out.println("student "+i+" score is "+scores[i]+"\tgrade is B");
			}
			else if(scores[i]>=(maxa-30)){
				System.out.println("student "+i+" score is "+scores[i]+"\tgrade is C");
			}
			else{
				System.out.println("student "+i+" score is "+scores[i]+"\tgrade is D");
			}
		}
		
	}
}