package com.company;import java.util.Scanner;public class Main {public static void main(String arg[]) { System.out.println("请输入一门成绩:"); Scanner input = new Scanner(System.in);float score = input.nextFloat();switch ((int) score / 10) {case 10: System.out.println("成绩为A等级");break;case 9: System.out.println("成绩为B等级");break;case 8: System.out.println("成绩为C等级");break;case 7: System.out.println("成绩为D等级");break;case 6: System.out.println("成绩为E等级");break;default: System.out.println("成绩不好,还要继续努力哦!"); } } }