PTA(分支结构)

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // 创建Scanner对象
        Scanner in=new Scanner(System.in);
        // 输入并保存年份
        int year = in.nextInt();
        // 判断生肖并输出
        String zodiac="";
        switch (year%12) {
        case 0:zodiac = "Monkey";break;
        case 1:zodiac = "rooster";break;
        case 2:zodiac = "dog";break;
        case 3:zodiac = "pig";break;
        case 4:zodiac = "rat";break;
        case 5:zodiac = "ox";break;
        case 6:zodiac = "tiger";break;
        case 7:zodiac = "rabbit";break;
        case 8:zodiac = "gragon";break;
        case 9:zodiac = "snake";break;
        case 10:zodiac = "horse";break;
        case 11:zodiac = "sheep";
        }
        System.out.println(zodiac);
    }

}

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
          Scanner in = new Scanner(System.in);
          double weight, height, bmi;
          weight = in.nextDouble();
          height = in.nextDouble();
          // 2、计算BMI值
          bmi = weight/((height/100)*(height/100));
          // 3、根据BMI值所在范围，输出结果
          System.out.printf("%.2f",bmi);
          System.out.println();
          if (bmi < 18.5) {
                 System.out.println("体重偏瘦");
          } else if (bmi < 25.0) {
                 System.out.println("体重正常");
          } else if (bmi < 30.0) {
                 System.out.println("体重超重");
          } else {
                 System.out.println("体重过胖");
          }
          in.close();
    }

}

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
		int year = scan.nextInt();
		int month = scan.nextInt();
		if(year%4==0&&year%100!=0 || year%400==0){
			switch(month){
				case 1:
				case 3:
				case 5:
				case 7:
				case 8:
				case 10:
				case 12:System.out.println(year+"年"+month+"月"+" 有"+31+"天");break;
				case 4:
				case 6:
				case 9:
				case 11:System.out.println(year+"年"+month+"月"+"有"+30+"天");break;
				case 2:System.out.println(year+"年"+month+"月"+"有"+29+"天");break;
			}
		}else{
			switch(month){
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:System.out.println(year+"年"+month+"月"+"有"+31+"天");break;
			case 4:
			case 6:
			case 9:
			case 11:System.out.println(year+"年"+month+"月"+"有"+30+"天");break;
			case 2:System.out.println(year+"年"+month+"月"+"有 "+28+"天");break;
			}
		}
    }
}

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        String s = String.valueOf(n);
        int i = 0;
        StringBuilder str = new StringBuilder();//创建可变字符串
        while(true){
            if(i>=s.length())  break;
            char c = s.charAt(i);
            switch(c){
                case '-':str.append("fu"+" ");break;
                case '0':str.append("ling"+" ");break;
                case '1':str.append("yi"+" ");break;
                case '2':str.append("er"+" ");break;
                case '3':str.append("san"+" ");break;
                case '4':str.append("si"+" ");break;
                case '5':str.append("wu"+" ");break;
                case '6':str.append("liu"+" ");break;    
                case '7':str.append("qi"+" ");break;
                case '8':str.append("ba"+" ");break;
                case '9':str.append("jiu"+" ");break;    
            }
            i++;
        }
        System.out.print(str.toString().trim());//清除两边的空格
    }
}