7-4 jmu-Java-02基本語法-06-枚舉 (3分)
定義一個枚舉類型Grade來表示考試的4個等級,值包含A,B,C,D,E
編寫一個函數Grade getGrade(int score)
將傳遞進來的score轉化爲枚舉類型
>=90 and <=100返回A,
>=80 and <90 返回B,
>=70 and <80 返回C,
>=60 and <70返回D,
其他的返回E
main方法
輸入分數後,調用getGrade函數返回相應的Grade,使用switch根據Grade,根據分數打印不同的評價:Excellent Good Average Fair Poor
並且每輸出一個評語後,要調用如下函數
public static void printGradeInfo(Grade grade){
System.out.println("class name="+Grade.class);
System.out.println("grade value="+grade);
}
輸入樣例:
90
80
70
60
輸出樣例:
Excellent
class name=class Grade
grade value=A
Good
class name=class Grade
grade value=B
Average
class name=class Grade
grade value=C
Fair
class name=class Grade
grade value=D
import java.util.Scanner;
enum Grade{
A,B,C,D,E;
}
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(sc.hasNext()) {
int score = sc.nextInt();
printGradeInfo(getGrade(score));
}
sc.close();
}
public static Grade getGrade(int score) {
Grade g ;
switch((int)score/10) {
case 10:
case 9:
System.out.println("Excellent");
g=Grade.A;
break;
case 8:
System.out.println("Good");
g=Grade.B;
break;
case 7:
System.out.println("Average");
g=Grade.C;
break;
case 6:
System.out.println("Fair");
g=Grade.D;
break;
default:
System.out.println("Poor");
g=Grade.E;
}
return g;
}
public static void printGradeInfo(Grade grade){
System.out.println("class name="+Grade.class);
System.out.println("grade value="+grade);
}
}