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package temp;
import java.util.Scanner;
public class grade {
public static void main(String[] args) {
Scanner scanner=new Scanner(System.in);
System.out.println("请输入学生成绩:");
int grade=scanner.nextInt();
switch(grade) {
case '优':
System.out.println(5);
break;
case '良':
System.out.println(4);
break;
case '中':
System.out.println(3);
break;
case '差':
System.out.println(2);
break;
default:
System.out.println("输入的等级错误");
break;
}
}
}