终于第二个完整的代码

package day3;

public class Apple {
public static void main(String[]args){
int a=60;
if(a>=90){
System.out.println("优秀");
}else if(80<=a && a<=89){
System.out.println("良好");
}else if(70<=a && a<=79){
System.out.println("中等");
}else if(0<=a && a<=60){
System.out.println("不及格");
}
}
}