Java小程序

一，百钱买百鸡问题

我国古代数学家张丘建在《算经》一书中曾提出过著名的“百钱买百鸡”问题，该问题叙述如下：鸡翁一，值钱五；鸡母一，值钱三；鸡雏三，值钱一；百钱买百鸡，则翁、母、雏各几何？`

public class Test {
    public static void main(String[] args) {
        int q = 0;
        for (int w = 0; w <= 20; w++) {
            for (int e = 0; e <= 33; e++) {
                int r = 100 - w - e;
                if (r % 3 == 0 && (5 * w + 3 * e + r / 3 == 100)) {
                    q = ++q;
                    System.out.println("方案" + q);
                    System.out.println("公鸡" + q + "母鸡" + e + "小鸡" + r);
                }
            }
        }
    }
}

二，多次输入数字，得到其对应月份

import java.util.Scanner;
public class Test {
    public static void main(String[] args) {
        int month;
        Scanner user=new Scanner(System.in);
        System.out.println("请输入一个月份数字");
        while (user.hasNext()){
            month=user.nextInt();
            switch (month) {
                case 1:
                    System.out.println(month + "属于春季");
                    break;
                case 2:
                    System.out.println(month + "属于春季");
                    break;
                case 3:
                    System.out.println(month + "属于春季");
                    break;
                case 4:
                    System.out.println(month + "属于夏季");
                    break;
                case 5:
                    System.out.println(month + "属于夏季");
                    break;
                case 6:
                    System.out.println(month + "属于夏季");
                    break;
                case 7:
                    System.out.println(month + "属于秋季");
                    break;
                case 8:
                    System.out.println(month + "属于秋季");
                    break;
                case 9:
                    System.out.println(month + "属于秋季");
                    break;
                case 10:
                    System.out.println(month + "属于冬季");
                    break;
                case 11:
                    System.out.println(month + "属于冬季");
                    break;
                case 12:
                    System.out.println(month + "属于冬季");
                    break;
                default:
                    System.out.println("输入的数字不在1-12内，请重新输入");
            }
        }
    }
}