10. 分支语句嵌套

1、多分支if嵌套

2、多分支switch嵌套

3、练习题1

代码如下：

import java.util.Scanner;
public class Demo9 {
    	public static void main(String[] args) {
    		Scanner superman = new Scanner(System.in);
    		int time;
    		System.out.println("你的跑步成绩为：");
    		time = superman.nextInt();
    		if (time <= 50){
    			System.out.println("恭喜你进入决赛");
            String sex;
            System.out.println("你的性别是：");
    		sex = superman.next();
    		switch (sex){
    		case "男":
    			System.out.println("你被分到了男子组");
    			break;
    		case "女":
    			System.out.println("你被分到了女子组");
    			break;
    		}
        }else{
    		System.out.println("你被淘汰了！");
    	}
    		System.out.println("-----------* __ * -----------");
    }
}

结果是：

4、练习2：计算你的真实年龄

代码如下：

import java.util.Scanner;

public class Demo1{
    	public static void main(String[] args){
    		Scanner superman = new Scanner(System.in);
    		int year;
    		int month;
    		int day;
    		int nowYear;
        int nowMonth;
        int nowDay;
        System.out.println("请输入出生年份：");
        year = superman.nextInt();
        System.out.println("请输入出生月份：");
        month = superman.nextInt();
        System.out.println("请输入出生日子：");
        day = superman.nextInt();
        System.out.println("请输入当前年份：");
        nowYear = superman.nextInt();
        System.out.println("请输入当前月份：");
        nowMonth = superman.nextInt();
        System.out.println("请输入当前日子：");
        nowDay = superman.nextInt();
    	if (nowYear > year){
    		if (nowMonth > month){
    			System.out.println("年龄：" + (nowYear - year));
    		}else if (nowMonth < month){
    			System.out.println("年龄：" + (nowYear - year - 1));
    		}else{
    			if (nowDay > day){
    				System.out.println("年龄：" + (nowYear - year));
    			}else{
    				System.out.println("年龄：" + (nowYear - year - 1));
    			}
    		}
    	 }else{
    		System.out.println("您输入的年份有误");
    	 }
    }
}

结果如下：

5、练习3

思路如下：

代码如下：

import java.util.Scanner;
public class Demo11 {
    	public static void main(String[] args) {
    		Scanner superman = new Scanner(System.in);
    		int money;
    		String str;
    		System.out.println("请问您是会员，还是普通会员:");
    		str = superman.next();
    		System.out.println("请输入您的购物金额:");
        money = superman.nextInt();
    	switch (str){
    	case "会员":
    		if (money < 200){
    			System.out.println("打8折");
    		}else{
    			System.out.println("打7.5折");
    		}
    		break;
    	case "普通会员":
    		if (money > 100){
    			System.out.println("打9折");
    		}else{
    			System.out.println("不打折");
    		}
    		break;
    	}
    	System.out.println("-------------*____*---------------");
   }
}

结果如下：