基础综合练习

た入场券 2024-03-24 15:56 89阅读 0赞

1.机票价格按照淡季旺季，头等舱经济舱，输入机票原价和月份经济舱或者头等舱。按照如下规则计算机票价格，旺季5-10月头等舱9折经济舱8.5折；淡季11-4月头等7折经济舱6.5折。

import java.util.Scanner;
    
    public class Java_1 {
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入机票原价");
            int ticket = sc.nextInt();
            System.out.println("请输入当前月份");
            int month = sc.nextInt();
            System.out.println("请输入当前 0头等舱 1经济舱");
            int sit = sc.nextInt();
            if (month >= 5 && month <= 10) {
                if (sit == 0) {
                    ticket = (int) (ticket * 0.9);
                } else if (sit == 1) {
                    ticket = (int) (ticket * 0.85);
                }
            } else if ((month >= 1 && month <= 4) || (month >= 11 && month <= 12)) {
                if (sit == 0) {
                    ticket = (int) (ticket * 0.7);
                } else if (sit == 1) {
                    ticket = (int) (ticket * 0.65);
                }
            } else {
                System.out.println("无效");
            }
            System.out.println(ticket);
        }
    }

![b35c2db9e8bc465cbf2e8615ad2e8c0c.jpeg][]

2.统计101到200间有多少个质数

public class Java_1 {
        public static void main(String[] args) {
            int count = 0;
            for (int i = 100; i <= 200; i++) {
                boolean flag = true;
                for (int j = 2; j < i; j++) {
                    if (i % j == 0) {
                        flag = false;
                        break;
                    }
                }
                if (flag==true) {
                    System.out.println(i + "是质数");
                    count++;
                }
            }
            System.out.println(count);
        }
    
    }

3.用大小写写字母数字组成验证码

import java.util.Random;
    public class Animal {
        public static void main(String[] args) {
            char[] chr = new char[52];//定义一个新变量52大小给大小写字母
            for (int i = 0; i < chr.length; i++) {
                if (i <= 25) {//小写字母97~122
                    chr[i] = (char) (97 + i);
                    System.out.print(chr[i] + " ");
                } else {//大写字母65~90
                    chr[i] = (char) (65 + i - 26);//(char)强转换
                    System.out.print(chr[i] + " ");
                }
            }
            String result = "";//引入result为最终验证码
            System.out.println(" ");//换行
            Random r = new Random();//生成随机数
            for (int i = 0; i < 4; i++) {
                int index = r.nextInt(chr.length);//index来收取随机数(char.length)是范围
                System.out.println(chr[index]);//输出收到的随机数
                result = result + chr[index];//result+4个随机字母
            }
            int number = r.nextInt(10);//0~10随机数
            result = result + number;//result+4个随机字母+1个随机数字
            System.out.println(result);//输出最终验证码
        }
    
    }

[b35c2db9e8bc465cbf2e8615ad2e8c0c.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/a80c1e40d10d491c97e896b3354c4385.png