第三次上机作业

• 编写“学生”类及其测试类。

5.1 “学生”类：

²   类名：Student

²   属性：姓名、性别、年龄、学号、5门课程的成绩

²   方法1：在控制台输出各个属性的值、

²   方法2：计算平均成绩

²   方法3：输出各个属性的值和平均成绩

5.2 测试类

²   创建2个对象，调用方法，要求：对象各个属性的值，从键盘输入。

• 编写“借书卡”类及其测试类。

  import java.until.*;
  public class Student {
      
      private String name;
      private int age;
      private String sex;
      private int num;
      private int englishScore;
      private int mathScore;
      private int physicsScore;
      private int languageScore;
      private int chemistryScore;
      private int averageScore;
      
      public Student(String name,int age,String sex,int num,int englishScore,int mathScore,int languageScore,int physicsScore,int chemistryScore){
          super();
          this.name=name;
          this.age=age;
          this.sex=sex;
          this.num=num;
          this.englishScore=englishScore;
          this.mathScore=mathScore;
          this.languageScore=languageScore;
          this.physicsScore=physicsScore;
          this.chemistryScore=chemistryScore;
      }
      public static void main(String[] args){
          Student st1=new Student("laodage",20,"男",40,60,60,60,60,60);
          Student st2=new Student("xiaodandan",19,"男",21,60,60,60,60,60);
          System.out.println("学生一："+st1);
          System.out.println("学生二："+st2);
      }
           
           
  
  
  
           
      public String getName() {
          return name;
      }
      public void setName(String name) {
          this.name = name;
      }
      public int getAge() {
          return age;
      }
      public void setAge(int age) {
          this.age = age;
      }
      public String getSex() {
          return sex;
      }
      public void setAge(int age) {
          this.sex = sex;
      }
      public String getenglishScore() {
          return englishScore;
      }
      public void setenglishScore(String englishScore) {
          this.englishScore = englishScore;
      }
      public String getlanguageScore() {
          return languageScore;
      }
      public void setlanguageScore(String languageScore) {
          this.languageScore = languageScore;
      }
      public String getmathScore() {
          return mathScore;
      }
      public void setmathScore(String mathScore) {
          this.mathScore = mathScore;
      }
      public String getphysiScore() {
          return physicsScore;
      }
      public void setphysicsScore(String physicsScore) {
          this.physicsScore = physicsScore;
      }
      public String getchemistScore() {
          return chemistryScore;
      }
      public void setchemistryScore(String chemistryScore) {
          this.chemistryScore = chemistryScore;
      }
      averageScore = (englishScore+languageScore+mathScore+chemistryScore+physicsScore)/5;
      public String toString() {
          return "Student [name=" + name + ", age=" + age + ", sex=" + sex + ",num=" + num +",englishScore=" + englishScore +",languageScore=" + languageScore +",mathScore=" + mathScore +",physicsScore=" + physicsScore +",chemistryScore=" + chemistryScore +",averageScore=" + averageScore +",]";
      }
      
      
      
      
      
      
      
      
      
      

  6.1 “借书卡”类

  ²   属性：账号、持卡人姓名、身份证号码、地址、已借书数、可借书数、本次借书数、本次还书数。

  class BookCard {  
         String Cardnum,name,Idname;
         int borrowsnum,Returnnum,Remain;
         public void borrow(int cash){  
             if(Remain>=cash){  
              Remain=Remain-cash;  
              System.out.println("本次借阅书数"+cash);  
              System.out.println("可借书数"+Remain);  
             }  
         }  
         public BookCard(String cardnum, String name, String idname, int borrowsnum,int returnnum, int remain) {  
          Cardnum = cardnum;  
          this.name = name;  
          Idname = idname;  
          this.borrowsnum = borrowsnum;  
          Returnnum = returnnum;  
          Remain = remain;  
         }  
          public BookCard() {  
          public void TheReturn(int cash){  
              Remain=Remain+cash;  
              System.out.println("本次还书数"+cash);  
              System.out.println("可借书数"+Remain);  
          }  
          public void query(){  
              System.out.println("可借书数"+Remain);  
          }  
  }  
  public class Task02 {  
      public static void main(String[] args) {       
          BookCard laodage=new BookCard();   
          laodage.borrowsnum=10;  
          laodage.Cardnum="111";  
          laodage.Idname="4304211998";  
          laodage.name="zp";  
          laodage.Remain=5;  
          laodage.Returnnum=2;  
          laodage.borrow(2);  
          laodage.TheReturn(1);  
          laodage.query();  
      }  
  }  

   

  ²   方法一：借书，显示本次借书数和可借书数。

  ²   方法二：还书，显示本次还书数和可借书数。

  6.2 测试类

  ²   本次借书数 和 本次还书数，从键盘输入。