🐋评委打分

分析：

代码实现：

public static void main(String[] args) {
    //1、数据准备
    //1.1、定义int变量保存评委分、最高分、最低分
    int p1,p2,p3,p4,p5,p6,max=Integer.MIN_VALUE,min=Integer.MAX_VALUE;
    //1.2、定义随机数变量
    Random r = new Random();
    //1.3、定义变量保存最终得分
    double finalScore;
    //1.4、定义变量保存日期
    Date d = new Date();
    //1.5、定义变量保存拼接后的日期字符串
    String dateStr="";
    //1.6、定义字符串，保存最终展示的所有内容
    String result="";
    //2、数据运算
    //2.1、生成6个随机分数保存到评分中
    p1 = r.nextInt(101);
    p2 = r.nextInt(101);
    p3 = r.nextInt(101);
    p4 = r.nextInt(101);
    p5 = r.nextInt(101);
    p6 = r.nextInt(101);
    //System.out.println(p1+"\t"+p2+"\t"+p3+"\t"+p4+"\t"+p5+"\t"+p6);
    //2.2、计算最高分
    max = max>=p1?max:p1;
    max = max>=p2?max:p2;
    max = max>=p3?max:p3;
    max = max>=p4?max:p4;
    max = max>=p5?max:p5;
    max = max>=p6?max:p6;
    //System.out.println(max);
    //2.3、计算最低分
    min = min<=p1?min:p1;
    min = min<=p2?min:p2;
    min = min<=p3?min:p3;
    min = min<=p4?min:p4;
    min = min<=p5?min:p5;
    min = min<=p6?min:p6;
    //System.out.println(min);
    //2.4、计算最终得分
    finalScore = (p1+p2+p3+p4+p5+p6-max-min)/4.0;
    //System.out.println(finalScore);
    //2.5、计算年月日字符串
    dateStr+=d.getYear()+1900+"-";
    dateStr+=(d.getMonth()+1)<=9?"0"+(d.getMonth()+1)+"-":(d.getMonth()+1)+"-";
    dateStr+=d.getDate()<=9?"0"+d.getDate():d.getDate()+"";
    //System.out.println(dateStr);
    //2.6、拼接最终展示效果
    result+="今日("+dateStr+")6位评委的分数分别为："+p1+"、"+p2+"、"+p3+"、"+p4+"、"+p5+"、"+p6+"\r\n";
    result+="去掉一个最高分"+max+"、去掉一个最低分"+min+"\r\n";
    result+="最终得分为："+finalScore+"分";
    //3、结果展示
    System.out.println(result);
}

💙 💜 ❤️ 💚💙 💜 ❤️ 💚💙 💜 ❤️ 💚💙 💜 ❤️💙 💜 ❤️ 💚💙 💜 ❤️ 💚💙 💜 ❤️ 💚

🐋超市收银管理（V3）

1）需求说明

模拟真实购物逻辑，以下述图片为需求原型，根据不同购物物品完成购物小票内容打印到控制台。

🌲 知识讲解—多位补0操作

两位数补0： x<=9?"0"+x:x+"";

多位数补0：代码实现

public static void main(String[] args) {
    //多位补0
    //不足6位 补0
    int r = 9;//
    String result1;
    //两种补0方式：int （不建议，繁琐）
    //10000~99999   补一个0
    //1000~9999 补两个0
    //100~999 补三个0
    //10~99 补四个0
    //0~9 补五个0
    result1 = (r>=10000&&r<=99999)?"0"+r:(
                (r>=1000&&r<=9999)?"00"+r:(
                        (r>=100&&r<=999)?"000"+r:(
                                (r>=10&&r<=99)?"0000"+r:(
                                        (r>=0&&r<=9)?"00000"+r:r+""
                                        )
                                )
                        )
                );
    System.out.println(result1);
    System.out.println("-----------------");
    //两种补0方式：String
    String str = "599999";
    //.length() ==5   补1个0
    //.length() ==4   补2个0
    //.length() ==3   补3个0
    //.length() ==2   补4个0
    //.length() ==1   补5个0
    String result = str.length()==5?"0"+str:(
                        str.length()==4?"00"+str:(
                                str.length()==3?"000"+str:(
                                        str.length()==2?"0000"+str:(
                                                str.length()==1?"00000"+str:str
                                                )
                                        )
                                )
                    );
    System.out.println(result);
}

🌲 超市收银管理—代码实现

public static void main(String[] args) {
    //1、----展示所有商品信息
    //1.0、定义Random、Scanner变量
    Random r = new Random();
    //接收数字
    Scanner sc1 = new Scanner(System.in);
    //接收字符串
    Scanner sc2 = new Scanner(System.in);
    //1.1、定义变量，保存商品信息
    String pid1,pid2,pid3,
            pname1,pname2,pname3;
    double price1,price2,price3;
    int num1,num2,num3;
    //1.2、控制台信息录入
    System.out.println("\t\t欢迎进入超市收银管理V3");
    System.out.println("首先，请输入所有的商品信息：");
    System.out.println("请输入第一个商品的名称：");
    pname1 = sc2.nextLine();
    System.out.println("请输入第一个商品的售价：");
    price1=sc1.nextDouble();
    System.out.println("请输入第二个商品的名称：");
    pname2 = sc2.nextLine();
    System.out.println("请输入第二个商品的售价：");
    price2=sc1.nextDouble();
    System.out.println("请输入第三个商品的名称：");
    pname3 = sc2.nextLine();
    System.out.println("请输入第三个商品的售价：");
    price3=sc1.nextDouble();
    //1.3、pid编号生成
    pid1=r.nextInt(100000)+"";
    pid2=r.nextInt(100000)+"";
    pid3=r.nextInt(100000)+"";
    pid1= pid1.length()==5?"0"+pid1:(
            pid1.length()==4?"00"+pid1:(
                    pid1.length()==3?"000"+pid1:(
                            pid1.length()==2?"0000"+pid1:(
                                    pid1.length()==1?"00000"+pid1:pid1
                            )
                    )
            )
    );
    pid2= pid2.length()==5?"0"+pid2:(
            pid2.length()==4?"00"+pid2:(
                    pid2.length()==3?"000"+pid2:(
                            pid2.length()==2?"0000"+pid2:(
                                    pid2.length()==1?"00000"+pid2:pid2
                            )
                    )
            )
    );
    pid3= pid3.length()==5?"0"+pid3:(
            pid3.length()==4?"00"+pid3:(
                    pid3.length()==3?"000"+pid3:(
                            pid3.length()==2?"0000"+pid3:(
                                    pid3.length()==1?"00000"+pid3:pid3
                            )
                    )
            )
    );
    //1.4、第一次数据展示
    System.out.println("编号\t\t品名\t\t\t售价");
    System.out.println(pid1+"\t\t"+pname1+"\t\t"+price1);
    System.out.println(pid2+"\t\t"+pname2+"\t\t"+price2);
    System.out.println(pid3+"\t\t"+pname3+"\t\t"+price3);

    //2、----计算并展示小票信息
    //2.0、定义日期
    Date d = new Date();
    String dateStr = "";
    //2.1、定义变量，保存商品信息，保存统计信息，定义Scanner变量
    double count1,count2,count3,total;
    int totalNum;
    //2.2、接收商品购买数量
    System.out.println("请您输入"+pid1+"购买数量");
    num1=sc1.nextInt();
    System.out.println("请您输入"+pid2+"购买数量");
    num2=sc1.nextInt();
    System.out.println("请您输入"+pid3+"购买数量");
    num3=sc1.nextInt();
    //2.3、计算数据
    count1 = price1*num1;
    count2 = price2*num2;
    count3 = price3*num3;

    total=count1+count2+count3;
    totalNum = num1+num2+num3;
    //2.4、拼接年月日、时分秒
    dateStr+=(d.getYear()+1900)+"-";
    dateStr+=((d.getMonth()+1)<=9?"0"+(d.getMonth()+1):(d.getMonth()+1))+"-";
    dateStr+=(d.getDate()<=9?"0"+d.getDate():d.getDate())+" ";
    dateStr+=(d.getHours()<=9?"0"+d.getHours():d.getHours())+":";
    dateStr+=(d.getMinutes()<=9?"0"+d.getMinutes():d.getMinutes())+":";
    dateStr+=d.getSeconds()<=9?"0"+d.getSeconds():d.getSeconds();
    //2.4、展示
    System.out.println("\t\t欢  迎  光  临");
    System.out.println("\t\t编号\t\t品名\t\t售价\t\t数量\t\t金额");
    System.out.println("-\t-\t-\t-\t-\t-\t-\t-\t");
    System.out.println("\t\t"+pid1+"\t\t"+pname1+"\t"+price1+"\t\t\t"+num1+"\t\t\t"+count1);
    System.out.println("\t\t"+pid2+"\t\t"+pname2+"\t"+price2+"\t\t\t"+num2+"\t\t\t"+count2);
    System.out.println("\t\t"+pid3+"\t\t"+pname3+"\t"+price3+"\t\t\t"+num3+"\t\t\t"+count3);
    System.out.println("-\t-\t-\t-\t-\t-\t-\t-\t");
    System.out.println("\t\t3 项商品\t\t共计："+totalNum+"件");
    System.out.println("\t\t总计："+total);
    System.out.println("\t\t"+dateStr);
    System.out.println("凭此小票换取发票！");
}