代码如下:
/*
从键盘输入一个成绩,判断成绩对应的等级
*/
import java.util.Scanner;
class Demo8
{
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);
System.out.println("请输入一个成绩:");
int score=sc.nextInt();
if(score>=90&&score<=100)
System.out.println("A");
else if(score>=80&&score<90)
System.out.println("B");
else if(score>=70&&score<80)
System.out.println("C");
else if(score>=60&&score<70)
System.out.println("D");
else
System.out.println("E");
}
}