JavaSE-2【数据输入、流程控制语句之分支结构】

package day2;
import java.util.Scanner;

/**
 * @Author: haifei
 * 数据输入、流程控制语句
 */

public class Demo1_0519 {
    public static void main(String[] args){
//        test1();
//        test2();
        test3();
    }

    public static void test1(){
        /*
        1、导包
        2、创建Scanner对象
        3、接收数据
         */
        Scanner sc = new Scanner(System.in);
//        System.out.print("请输入：");
//        int x = sc.nextInt();
//        System.out.println("x=" + x);

        System.out.print("请输入第1个人的身高：");
        int height1 = sc.nextInt();
        System.out.print("请输入第2个人的身高：");
        int height2 = sc.nextInt();
        System.out.print("请输入第3个人的身高：");
        int height3 = sc.nextInt();
        int tempHeight = (height1 > height2) ? height1 : height2;
        int maxHeight = (tempHeight > height3) ? tempHeight : height3;
        System.out.println("最高身高：" + maxHeight);
    }

    public static void test2(){
        /*
        顺序结构
        分支结构(if, switch)
        循环结构(for, while, do…while)
         */
        int a = 10;
        int b = 20;

        System.out.println("begin");
        if(a == b){
            System.out.println("a==b");
        }
        System.out.println("end");

        System.out.println("begin");
        if(a > b){
            System.out.println("a>b");
        }else {
            System.out.println("a<=b");
        }
        System.out.println("end");

        // 案例：任意给出一个整数，请用程序实现判断该整数是奇数还是偶数，并在控制台输出该整数是奇数还是偶数。
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入一个整数:");
        int num = sc.nextInt();
        if(num % 2 == 0){
            System.out.println(num + "是偶数");
        }else {
            System.out.println(num + "不是偶数");
        }

        System.out.print("请输入1-7间的一个整数：");
        int week = sc.nextInt();
        if(week == 1){
            System.out.println("星期一");
        }else if(week == 2){
            System.out.println("星期二");
        }else if(week == 3){
            System.out.println("星期三");
        }else if(week == 4){
            System.out.println("星期四");
        }else if(week == 5){
            System.out.println("星期五");
        }else if(week == 6){
            System.out.println("星期六");
        }else if(week == 7){
            System.out.println("星期日");
        }else {
            System.out.println("输入错误");
        }

        // 案例
        System.out.print("请输入小明的分数(0-100整数)：");
        int score = sc.nextInt();
        if (score<0 || score>100){
            System.out.println("输入分数有误");
        }else if (score>90 && score<=100){
            System.out.println("奖励捷安特一台");
        }else if (score>75 && score<=90){
            System.out.println("奖励手办一个");
        }else if (score>60 && score<=75){
            System.out.println("奖励棒棒糖一根");
        }else {
            System.out.println("不及格，一顿打");
        }
        //数据测试：正确数据，边界数据，错误数据 --> 程序健壮
    }

    public static void test3(){
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入1-7间的一个整数：");
        int week = sc.nextInt();
        switch (week){
            case 1:
                System.out.println("周一");
                break;
            case 2:
                System.out.println("周二");
                break;
            case 3:
                System.out.println("周三");
                break;
            case 4:
                System.out.println("周四");
                break;
            case 5:
                System.out.println("周五");
                break;
            case 6:
                System.out.println("周六");
                break;
            case 7:
                System.out.println("周日");
                break;
            default:
                System.out.println("输入错误");
                break;
        }

        // 案例
        System.out.print("请输入月份（1-12间整数）");
        int month = sc.nextInt();
        switch (month){ // 利用case穿透
            case 1:
            case 2:
            case 12:
                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;
            default:
                System.out.println("输入错误");
        }
    }

}