总结:从键盘输入分数-----
如果在0到100内,则输出等级
小于0或者是大于100都不能输出,这里用if-else条件判断。
package com.c2; import java.util.Scanner; /** * * @author Administrator */ public class Olk{ /** * @param args the command line arguments */ public static void main(String[] args) { Scanner c=new Scanner(System.in); System.out.println("请输入你的分数-----"); int x=c.nextInt(); if(x>0&&x<100){ switch(x/10){ case 1: case 2: case 3: case 4: case 5: System.out.println("E"); break; case 6: System.out.println("D"); break; case 7: System.out.println("c"); break; case 8: System.out.println("B"); break; case 9: case 10: System.out.println("A"); break; default: break; } } else { System.out.println("无效"); } } }