java--while小练习和switch小练习

while小练习动态录入学生个数，成绩，求总成绩和平均值

package learnday2;
import java.util.Scanner;

 * @description:动态录入学生成绩，并求总分和平均值

public class whileDemo01 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入学生个数");
        int numStudent = scanner.nextInt();
        int sum = 1;
        double totalScore = 0;
        while (sum<=numStudent) {
            System.out.println("请输入第"+sum+"学生的成绩");
            double studentScore = scanner.nextDouble();
            totalScore +=studentScore;
            sum++;
        }
        System.out.println("总成绩为：" +totalScore);
        System.out.println("平均成绩为："+(totalScore/numStudent));
        scanner.close();
    }
}
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switch小练习

package learnday2;

import java.util.Scanner;

public class SwitchDemo01 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入(1-12)任意一个数字作为月份,以任意字母结束程序");
        while (scanner.hasNextInt()) {
            int number = scanner.nextInt();
            switch (number){
                case 12:
                case 1:
                case 2:
                    System.out.println("冬季");
                    break;
                case 3:
                case 4:
                case 5:
                    System.out.println("春季");
                    break;
                case 6:
                case 7:
                case 8:
                    System.out.println("夏季");
                    break;
                case 9:
                case 10:
                case 11:
                    System.out.println("秋季");
                    break;
            }
        }
        scanner.close();
    }
}