javaswitch语句判断成绩 java用switch判断成绩

import java.util.Scanner;
public class test02 {
/**
 * 成绩判断的列子 switch
 * @param args
 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		System.out.println("请输入成绩:");
		int x =scanner.nextInt();
		switch (x/10) {
		case 10:

		case 9:
			System.out.println("A");
		break;
		case 8:
			System.out.println("B");
		break;	
		case 7:
			System.out.println("C");
		break;	
		case 6:
			System.out.println("C");
		break;
		default:
			if(x>100 || x<0){
				System.out.println("成绩有误");
				break;
			}
			System.out.println("E");
		break;
		}
	}}