public class CustomerDemo { class Customer { private String cardID; private String name; private double cost = 0; private String address; private String email; private double discount = 1; public Customer(String id,String name,String add,String email) { cardID = id; this.name = name; address = add; this.email=email; } public void buy(double cost) { this.cost +=cost; } public void setDiscount() { if (cost>2000.00) discount -= 0.2; else if (cost>1000.00) discount -=0.1; } public String getAddress() { return address; } public void setAddress(String address) { this.address=address; } public String getCardID() { return cardID; } public void setCardID(String cardID) { this.cardID=cardID; } public double getCost() { return cost; } public double getDiscount() { return discount; } public String getEmail() { return email; } public void setEmail(String email) { this.email=email; } public String getName() { return name; } public void setName(String name) { this.name=name; } } Customer customer[] = new Customer[3]; public CustomerDemo() { customer[0] = new Customer("001","wang ziyu","BeiJing","wangziyu@qq.com"); customer[1] = new Customer("002","Zhang zhiyi","ShangHai","Zhangzhiyi@qq.com"); customer[2] = new Customer("003","Li yanxi","BeiJing","Liyanxi@qq.com"); customer[0].buy(2600.00); customer[0].setDiscount(); customer[1].buy(1579.00); customer[1].setDiscount(); customer[2].buy(880.00); customer[2].setDiscount(); for(int i=0; i < customer.length; i++) { System.out.println("customer["+ i +"]"); System.out.println("cardID:" + customer[i].getCardID()); System.out.println("name:" + customer[i].getName()); System.out.println("cost:" + customer[i].getCost()); System.out.println("dico其中重要变量的定义和作用

SCJP 310-055 面向对象编程题库解析

public void setCardInformation(String cardID, String ownerName, Integer limit) { this.cardID = cardID; this.ownerName = ownerName; this.limit = limit; } } 这里cardID和limit被声明为私有...

Java封装特性详解与Oracle认证考试知识点

public void setOwnerName(String name) { this.ownerName = name; } public String getOwnerName() { return ownerName; } // 同样为cardID和limit提供setter和getter方法 } 这样的设计确保了对外部...

public class Card implements Serializable { /** * 与数据库的cardid映射 */ private String cardId; /** * =与数据库的memberid映射 */ private String memberId; private Integer balance; private Integer integral; private Integer lose; private static final long serialVersionUID = 1L; public String getcardId() { return cardId; } public void setcardId(String cardId) { this.cardId = cardId == null ? null : cardId.trim(); } public String getmemberId() { return memberId; } public void setmemberId(String memberId) { this.memberId = memberId == null ? null : memberId.trim(); } public Integer getBalance() { return balance; } public void setBalance(Integer balance) { this.balance = balance; } public Integer getIntegral() { return integral; } public void setIntegral(Integer integral) { this.integral = integral; } public Integer getLose() { return lose; } public void setLose(Integer lose) { this.lose = lose; }

- cardId：与数据库表中的 cardid 字段映射，为 String 类型； - memberId：与数据库表中的 memberid 字段映射，为 String 类型； - balance：映射了余额字段，为 Integer 类型； - integral：映射了积分字段，为 ...

请帮我注释以下C++代码#include <iostream> #include <string> #include <vector> #include <algorithm> using namespace std; // 定义顾客类 class Customer { public: Customer(string cardId, string name, char sex, string phone) : m_cardId(cardId), m_name(name), m_sex(sex), m_phone(phone) {} // 获取和设置会员卡号 string getCardId() { return m_cardId; } void setCardId(string cardId) { m_cardId = cardId; } // 获取和设置姓名 string getName() { return m_name; } void setName(string name) { m_name = name; } // 获取和设置性别 char getSex() { return m_sex; } void setSex(char sex) { m_sex = sex; } // 获取和设置电话 string getPhone() { return m_phone; } void setPhone(string phone) { m_phone = phone; } private: string m_cardId; string m_name; char m_sex; string m_phone; }; // 定义员工类 class Employee { public: Employee(int number, string name, char sex, string phone, string project) : m_number(number), m_name(name), m_sex(sex), m_phone(phone), m_project(project) {} // 获取和设置编号 int getNumber() { return m_number; } void setNumber(int number) { m_number = number; } // 获取和设置姓名 string getName() { return m_name; } void setName(string name) { m_name = name; } // 获取和设置性别 char getSex() { return m_sex; } void setSex(char sex) { m_sex = sex; } // 获取和设置电话 string getPhone() { return m_phone; } void setPhone(string phone) { m_phone = phone; } // 获取和设置美发项目 string getProject() { return m_project; } void setProject(string project) { m_project = project; }

比如，第 11 行的构造函数中，m_cardId(cardId) 表示直接将参数 cardId 的值赋给成员变量 m_cardId，而不需要在构造函数中再一次赋值。这些类的定义可以作为其他程序的基础，用于实现更复杂的功能。

private ushort _CardID = 0; private int[] _PosX = null; private int[] _PosY = null; private int[] _PosZ = null; private double[] _Time = null; private double[] _SpeedX = null; private double[] _SpeedY = null; private double[] _SpeedZ = null;

1. _CardID：控制卡的ID，用于指定控制哪个运动设备。 2. _PosX、_PosY、_PosZ：分别表示机器人或其他运动设备在X、Y、Z三个轴向的目标位置，用整型数组存储。 3. _Time：表示机器人或其他运动设备运动到...

private ushort _CardID = 0;

这段代码定义了一个名为_CardID的私有字段（private field），它的类型是ushort，即无符号的16位整数类型。这个字段的初始值为0。 private关键字表示这个字段只能在当前类的内部访问，其他类无法访问它。这种封装的...

public partial class Form1 : Form { private ushort _CardID = 0; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { short num = LTDMC.dmc_board_init();//获取卡数量 if (num <= 0 || num > 8) { MessageBox.Show("初始卡失败!", "出错"); } ushort _num = 0; ushort[] cardids = new ushort[8]; uint[] cardtypes = new uint[8]; short res = LTDMC.dmc_get_CardInfList(ref _num, cardtypes, cardids); if (res != 0) { MessageBox.Show("获取卡信息失败!"); } _CardID = cardids[0]; // timer1.Start(); }

这段代码是一个 Windows 窗体应用程序中的 Form1...最后，将第一个卡的 ID 存储在私有变量 _CardID 中，并启动一个计时器 timer1。这段代码的目的是初始化运动控制卡，并获取第一个卡的 ID，以便在后续的代码中使用。

private void timer1_Tick(object sender, EventArgs e) { double XSpeed = LTDMC.dmc_read_current_speed(_CardID, 0); XActVel.Text = XSpeed.ToString()+" Pluse/s"; double YSpeed = LTDMC.dmc_read_current_speed(_CardID, 1); YActVel.Text = YSpeed.ToString()+" Pluse/s"; double ZSpeed = LTDMC.dmc_read_current_speed(_CardID, 2); ZActVel.Text = ZSpeed.ToString()+" Pluse/s"; double XPos = 0; XPos= LTDMC.dmc_get_position(_CardID, 0); XActPos.Text = XPos.ToString() + " Pluse"; double YPos = 0; YPos =LTDMC.dmc_get_position(_CardID, 1); YActPos.Text = YPos.ToString() + " Pluse"; double ZPos = 0; ZPos= LTDMC.dmc_get_position(_CardID, 2); ZActPos.Text = ZPos.ToString() + " Pluse";

这段代码是一个计时器 Tick 事件的处理函数，用于实时读取三个轴的速度和位置信息，并在界面上显示出来。首先分别调用 LTDMC 库中的 dmc_read_current_speed 和 dmc_get_position 函数，读取三个轴的实时速度和位置...

public CinemaResult rechargeCard(String cardId, String value) { cardService.rechargeCard(cardId, Integer.parseInt(value)); return CinemaResult.ok(); }

该方法的参数是两个字符串类型的参数，分别是 cardId 和 value。cardId 表示要充值的会员卡的 ID，value 表示要充值的金额。该方法调用了 cardService 的 rechargeCard 方法，将 cardId 和 value 作为参数传递给它。...

帮我debug：package org.zkpk.lab import org.apache.spark.SparkContext import org.apache.spark.SparkConf import org.apache.spark.rdd.RDD import org.apache.spark.sql.SQLContext object sale_drug { case class Sale(date:String,cardId:Int,productId:Int,productName:String ,quantity:Int,money:Double,cost:Double) def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName("Pharmacy Sales Analysis").setMaster("local") val sc = new SparkContext(conf) sc.setLogLevel("ERROR") val sqlContext = new SQLContext(sc) // load data val data = sc.textFile("/home/zkpk/data.txt") // parse data val salesRDD: RDD[Sale] = data.map(line => line.split(" ")).map(arr => Sale(arr(0).toString, arr(1).toInt, arr(2).toInt, arr(3).toString, arr(4).toInt, arr(5).toDouble, arr(6).toDouble)) import sqlContext.implicits._ val df = salesRDD.toDF() val nameMoneyDF = df.select("productName", "money") nameMoneyDF.show() // calculate total sales quantity and revenue } }

case class Sale(date:String,cardId:Int,productId:Int,productName:String ,quantity:Int,money:Double,cost:Double) def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName(...

case class Sale(cardId:String,productId:Int,productName:String,quantity:Int,money:Double) def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName("Pharmacy Sales Analysis").setMaster("local") val sc = new SparkContext(conf) sc.setLogLevel("ERROR") val sqlContext = new SQLContext(sc) // load data val data = sc.textFile("/home/zkpk/saledata.csv")加入处理缺失值

case class Sale(cardId:String,productId:Int,productName:String,quantity:Int,money:Double) def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName("Pharmacy Sales Analysis")....

@RequestMapping("cancelCard") public CinemaResult cancelCard(String cardId) { cardService.cancelCard(cardId); return CinemaResult.ok(); }

这段代码是一个Java Spring框架中的...该请求需要传入一个参数：cardId。在该方法中，会调用cardService的cancelCard方法，将该会员的会员卡注销，并从数据库中删除该会员卡信息。最后返回一个状态码为200的成功信息。

package org.zkpk.lab import org.apache.spark.SparkContext import org.apache.spark.SparkConf import org.apache.spark.rdd.RDD import org.apache.spark.sql.SQLContext object sale_drug { case class Sale(cardId:String,productId:Int,productName:String ,quantity:Int,money:Double) def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName("Pharmacy Sales Analysis").setMaster("local") val sc = new SparkContext(conf) sc.setLogLevel("ERROR") val sqlContext = new SQLContext(sc) // load data val data = sc.textFile("/home/zkpk/saledata.txt") // parse data val salesRDD: RDD[Sale] = data.map(line => line.split(" ")).map(arr => Sale(arr(0).toString, arr(1).toInt, arr(2).toString, arr(3).toInt, arr(4).toDouble)) import sqlContext.implicits._ val df = salesRDD.toDF() val nameMoneyDF = df.select("productName","money") nameMoneyDF.show()加入处理缺失值

val filledDF = df.na.fill(Map("columnName" -> 0, "otherColumnName" -> "unknown")) // 将指定列的 null 或 NaN 填充为指定值 3. 替换缺失值 scala val replacedDF = df.na.replace("columnName", ...

private void timer1_Tick(object sender, EventArgs e) { int pos = LTDMC.dmc_get_position(_CardID, GetAxis()); StringBuilder sb = new StringBuilder(); sb.AppendFormat("当前脉冲位置:{0},", pos); double speed=LTDMC.dmc_read_current_speed(_CardID,GetAxis()); sb.AppendFormat("速度:{0}", speed); textBox1.Text = sb.ToString(); }

其中，LTDMC 库是一个用于控制运动控制卡的库，_CardID 表示运动控制卡的编号，GetAxis() 是一个自定义方法，用于获取指定轴的编号。具体的实现过程是，首先调用 dmc_get_position 方法获取指定轴的当前...

import org.apache.spark.SparkContext import org.apache.spark.SparkConf import org.apache.spark.rdd.RDD import org.apache.spark.sql.SQLContext class Sale { } object Sale { case class Sale(cardId:String,productId:Int,quantity:Int,money:Double) def main(args: Array[String]): Unit = { val conf = new SparkConf().setAppName("Pharmacy Sales Analysis").setMaster("local") val sc = new SparkContext(conf) sc.setLogLevel("ERROR") val sqlContext = new SQLContext(sc) // load data val data = sc.textFile(args(0)) // parse data val salesRDD: RDD[Sale] = data.map(line => line.split(" ")).map(arr => Sale(arr(0), arr(1).toInt, arr(2).toInt, arr(3).toDouble)) import sqlContext.implicits._ val df = salesRDD.toDF() val nameMoneyDF = df.select("productId","money","quantity") nameMoneyDF.show(5) val totalSales = nameMoneyDF.groupBy("productId").sum("quantity") totalSales.show(5) // calculate total sales quantity and revenue } }帮我统计购买最多的前五个客户

val customerRDD: RDD[Customer] = customerData.map(line => line.split(" ")).map(arr => Customer(arr(0), arr(1))) // load sales data val salesData = sc.textFile("path/to/sales/data") // parse sales data...

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