四则运算程序
psp
| PSP各个阶段 | 预估时间 | 实际时间 |
| 计划 | 20 | 20 |
| 需求分析 | 10 | 10 |
| 生成设计文档 | 7 | 9 |
| 设计与复审 | 10 | 15 |
| 代码规范 | 10 | 12 |
| 具体设计 | 30 | 30 |
| 具体编码 | 120 | 150 |
| 代码复审 | 60 | 60 |
| 测试 | 10 | 10 |
| 测试报告 | 7 | 8 |
| 计算工作量 | 5 | 5 |
| 事后总结 | 10 | 9 |
| 时间总计 | 299 | 338 |
具体代码：
登录（Login）
package szys;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.*;
public class Login {
public static void main(String args[]) {
new Login();
}
Login(){
JFrame w = new JFrame("登录界面");
w.setLayout(null);
w.setBounds(50, 50, 800,750);
//设置标签
JLabel a = new JLabel();
JLabel b = new JLabel();
JLabel c = new JLabel();
JLabel d = new JLabel();
JLabel e = new JLabel();
a.setText("欢迎使用四则运算");
b.setText("账号:");
c.setText("密码:");
d.setText("注册");
e.setText("忘记密码");
a.setBounds(120, 350, 600, 50);
Font font = new Font("欢迎使用四则运算",Font.PLAIN,30);
Font font1 = new Font("账号:",Font.LAYOUT_LEFT_TO_RIGHT,20);
Font font2 = new Font("密码:",Font.LAYOUT_LEFT_TO_RIGHT,20);
Font font3 = new Font("注册",Font.LAYOUT_LEFT_TO_RIGHT,20);
Font font4 = new Font("忘记密码",Font.LAYOUT_LEFT_TO_RIGHT,20);
a.setFont(font);
b.setFont(font1);
c.setFont(font2);
d.setFont(font3);
e.setFont(font4);
a.setBounds(250,350,300,50);
b.setBounds(200,450,100,50);
c.setBounds(200,500,100,50);
d.setBounds(10,670,50,20);
e.setBounds(700,670,100,20);
w.add(a);
w.add(b);
w.add(c);
w.add(d);
w.add(e);
//设置按钮
JButton jb1 = new JButton();
jb1.setText("登录");
jb1.setOpaque(true);
jb1.setBackground(Color.cyan);
jb1.setBounds(250, 580, 250, 50);
w.add(jb1);
//设置图片
java.awt.Dimension dim1=new java.awt.Dimension(800,300);//图片大小
java.awt.Dimension dim2=new java.awt.Dimension(800,750);
javax.swing.ImageIcon icon=new javax.swing.ImageIcon("E:\\图片3.jpg");
javax.swing.ImageIcon background = new ImageIcon("E:\\图片1.png");
JLabel labpic=new JLabel(icon);//不可以直接把图片加到顶级容器中，需要先将其设置为标签
JLabel labpic1=new JLabel(background);
labpic.setBounds(0, 0, 800, 300);
labpic1.setBounds(0,0, 800, 750);
labpic.setPreferredSize(dim1);
labpic1.setPreferredSize(dim2);
labpic1.setOpaque(false);
w.add(labpic);//再将标签加到顶级容器中
w.add(labpic1);
//设置文本框
JPasswordField jt1 = new JPasswordField();
JTextField jt2 = new JTextField();
jt2.setBounds(300, 460, 250, 30);
jt1.setBounds(300, 510, 250, 30);
w.add(jt1);
w.add(jt2);
w.setVisible(true);
LoginListener ll=new LoginListener(w,jt2,jt1);
jb1.addActionListener(ll);//监控按钮
}
}
//LoginListener的类
//监听事件
class LoginListener implements ActionListener{
private javax.swing.JTextField jt;//账号输入框对象
private javax.swing.JPasswordField jp;//密码输入框对象
private javax.swing.JFrame login;//定义一个窗体对象
public LoginListener(javax.swing.JFrame login,javax.swing.JTextField jt,javax.swing.JPasswordField jp) {
this.login=login;//获取登录界面
this.jt=jt;//获取登录界面中的账号输入框对象
this.jp=jp;//获取登录界面中的密码输入框对象
}
public void actionPerformed(ActionEvent e) {
//利用get方法来获取账号和密码对象的文本信息，并用equal方法进行判断。最好不要用==，用==这个地方验证不过去。
if(jt.getText().equals("2019310143029")&&jp.getText().equals("123")) {
new GuiDesign();
// 通过我们获取的登录界面对象，用dispose方法关闭它
login.dispose();
}
else {
}
}
}
GuiDesign.java
package szys;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import szys.Operation;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
public class GuiDesign {
private JFrame mainWindow = new JFrame("四则运算练习软件");
//面板
private JPanel selectPanel = new JPanel();
private JPanel mainPanel = new JPanel();
private JPanel commandP = new JPanel();
private JButton JBRedo = new JButton("重做");
private JButton JBStart = new JButton("开始做题");
private JLabel JLUsersName = new JLabel("请输入你的用户名：");
private JLabel JLChooseOp = new JLabel("请选择运算类型：");
private JLabel JLNumberDigit = new JLabel("请选择运算位数：");
private JLabel JLBAnsTip = new JLabel("输入答案");
private JLabel JLBRemainTip = new JLabel("余数");
private JTextField JTFUserName = new JTextField(8);//10的单位不是px 而是指定列数
private String[] operationType = {"+","-","*","/","混合"};
private String[] numberOfDigitType = {"1","2","3","4"};
private JComboBox<String> JCBOperationSelect = new JComboBox<String>(operationType);//JComboBox 泛型 需要加上<E>
private JComboBox<String> JCBNumberOfDigit = new JComboBox<String>(numberOfDigitType);
//显示题目的JLabel
private JLabel[] JLBQuestions= new JLabel[10];
//显示正确答案的JLabel
private JLabel[] JLBAnswers = new JLabel[10];
//显示用户答案是否正确的JLabel
private JLabel[] JLBIsTrue = new JLabel[10];
private JTextField[] JTFUsersAnswer = new JTextField[10];//定义变量时需要赋初值，不然会出现空指针异常问题
private JTextField[] JTFRemainder = new JTextField[10];
//设置Font
private Font buttonFont = new Font("微软雅黑",Font.PLAIN,16);
private Font JLBFont = new Font("微软雅黑",Font.BOLD,18);
private Font JTFFont = new Font("微软雅黑",Font.PLAIN,18);
private Font JLBAnsFont = new Font("微软雅黑",Font.PLAIN,16);
//类型为Operation的questions数组，只有这个才和Operation类等等那些类关联起来
private Operation[] questions = new Operation[10];
//用户答案数组
private int[] userAnswer = new int[10];
//用户余数数组
private int[] remainder = new int[10];
private int scores ,n = 1;
private JLabel JLBScores = new JLabel("你的成绩为:");
private JButton JBOpenFile = new JButton("查看记录");
private String chara = "+";
private File pFile = new File("四则运算记录");
private int usedTime;
boolean runFlag = false;//runFlag默认为false
private JPanel PTime = new JPanel();
private JLabel JLBRemainTime = new JLabel("剩余时间：");
private JTextField JTFWtime = new JTextField("120");
private JLabel JLBTime = new JLabel("用时：");
//LimitTime t = new LimitTime();//线程不可以在这里new
//倒计时线程
class LimitTime extends Thread{
public void run()
{
runFlag = true;
int i = 120;
usedTime = 0;
while(runFlag && i >= 0)
{
JTFWtime.setText(""+i);
try {
sleep(1000);
usedTime++;
} catch (InterruptedException e) {
JFrame jf = new JFrame();
JOptionPane.showMessageDialog(jf,"出现了未知问题，请重启程序");
}
i--;
}
//runFlag = false;
for(int j = 0;j < 10;j++)
{
if(JTFUsersAnswer[j].getText().equals(""))
{
JTFUsersAnswer[j].setText("0");
}
}
printAnswer();//倒计时结束，则调用printAnswer()方法
JBStart.setText("开始做题");
JLBTime.setText("用时："+usedTime);
}
}
public GuiDesign(){
//布局用户名&选择面板
selectPanel.setPreferredSize(new Dimension(700,50));
//selectPanel.setLayout(new GridLayout(1,6,25,20));
JLUsersName.setFont(JLBFont);
selectPanel.add(JLUsersName);
JTFUserName.setFont(JLBFont);
selectPanel.add(JTFUserName);
JLChooseOp.setFont(JLBFont);
selectPanel.add(JLChooseOp);
JCBOperationSelect.setPreferredSize(new Dimension(50,25)); //当selectPanel.setLayout那句存在时，这里的设置无效
selectPanel.add(JCBOperationSelect);
JLNumberDigit.setFont(JLBFont);
selectPanel.add(JLNumberDigit);
JCBNumberOfDigit.setPreferredSize(new Dimension(50,25));
selectPanel.add(JCBNumberOfDigit);
//布局主面板
mainPanel.setPreferredSize(new Dimension(700,400));
//mainPanel.setLayout(new GridLayout(10,3,5,10));
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints GBC = new GridBagConstraints();
GBC.weightx = 1;//加上这两行之后文本框的大小会和不加时不同 因为它描述的是随面板变化的情况 而现在面板的设定值是800*500 因此不同(不以设定大小为默认值)
GBC.weighty = 1;
//GBC.fill = GridBagConstraints.BOTH;//weightx描述的是网格的大小随面板大小变化，组件的大小并不会随之变化 要使组件随之变化需要控制它对所在位置的填充方式
//GBC.insets = new Insets(1,1,2,2);
GBC.gridx = 1;
GBC.gridy = 0;
GBC.anchor = GridBagConstraints.WEST;
gridbag.setConstraints(JLBAnsTip, GBC);
JLBAnsTip.setFont(JLBFont);
mainPanel.add(JLBAnsTip);
GBC.gridx = 2;
gridbag.setConstraints(JLBRemainTip, GBC);
JLBRemainTip.setFont(JLBFont);
mainPanel.add(JLBRemainTip);
GBC.gridx = 4;
GBC.gridwidth = 2;
GBC.anchor = GridBagConstraints.CENTER;
gridbag.setConstraints(JLBScores, GBC);
JLBScores.setFont(JLBFont);
mainPanel.add(JLBScores);
for(int i = 0;i < 5;i++)
{
JLBQuestions[i] = new JLabel("点击开始做题显示题目");
JLBQuestions[i].setFont(JLBFont);
JTFUsersAnswer[i] = new JTextField(5); //一定要加这行 不然会出现空指针错误
JTFUsersAnswer[i].setFont(JTFFont);
JTFRemainder[i] = new JTextField(3);
JTFRemainder[i].setFont(JTFFont);
JLBAnswers[i] = new JLabel("");
JLBAnswers[i].setFont(JLBAnsFont);
JLBIsTrue[i] = new JLabel("");
JLBIsTrue[i].setFont(JLBAnsFont);
//gridbag.setConstraints(JLBQuestions[i],new GridBagConstraints(i,0,5,10,1,1,GridBagConstraints.CENTER,GridBagConstraints.NONE,new Insets(2,2,2,2),0,0));
//gridbag.setConstraints(JTFUsersAnswer[i],new GridBagConstraints(i,1,5,10,1,1,GridBagConstraints.CENTER,GridBagConstraints.NONE,new Insets(2,2,2,2),0,0));
//gridbag.setConstraints(JTFRemainder[i],new GridBagConstraints(i,2,5,10,1,1,GridBagConstraints.CENTER,GridBagConstraints.NONE,new Insets(2,2,2,2),0,0));
GBC.gridwidth = 1;
GBC.gridx = 0;
GBC.gridy = 2*i+1;
GBC.anchor = GridBagConstraints.EAST;
gridbag.setConstraints(JLBQuestions[i], GBC);
mainPanel.add(JLBQuestions[i]);
GBC.anchor = GridBagConstraints.CENTER;
GBC.gridy = 2*i+2;
GBC.gridwidth = 2;
gridbag.setConstraints(JLBAnswers[i], GBC);
mainPanel.add(JLBAnswers[i]);
GBC.gridwidth = 1;
GBC.gridx = 1;
GBC.gridy = 2*i+1;
GBC.anchor = GridBagConstraints.WEST;
gridbag.setConstraints(JTFUsersAnswer[i],GBC);
mainPanel.add(JTFUsersAnswer[i]);
GBC.gridx = 2;
gridbag.setConstraints(JTFRemainder[i],GBC);
mainPanel.add(JTFRemainder[i]);
GBC.gridy = 2*i+2;
gridbag.setConstraints(JLBIsTrue[i], GBC);
mainPanel.add(JLBIsTrue[i]);
}
for(int i = 5;i < 10;i++)
{
JLBQuestions[i] = new JLabel("点击开始做题显示题目");
JLBQuestions[i].setFont(JLBFont);
JTFUsersAnswer[i] = new JTextField(5); //一定要加这行 不然会出现空指针错误
JTFUsersAnswer[i].setFont(JTFFont);
JTFRemainder[i] = new JTextField(3);
JTFRemainder[i].setFont(JTFFont);
JLBAnswers[i] = new JLabel("");
JLBAnswers[i].setFont(JLBAnsFont);
JLBIsTrue[i] = new JLabel("");
JLBIsTrue[i].setFont(JLBAnsFont);
GBC.gridx = 4;
GBC.gridy = 2*i-9;
GBC.anchor = GridBagConstraints.EAST;
gridbag.setConstraints(JLBQuestions[i], GBC);
mainPanel.add(JLBQuestions[i]);
GBC.anchor = GridBagConstraints.CENTER;
GBC.gridy = 2*i-8;
GBC.gridwidth = 2;
gridbag.setConstraints(JLBAnswers[i], GBC);
mainPanel.add(JLBAnswers[i]);
GBC.gridwidth = 1;
GBC.gridx = 5;
GBC.gridy = 2*i-9;
GBC.anchor = GridBagConstraints.WEST;
gridbag.setConstraints(JTFUsersAnswer[i],GBC);
mainPanel.add(JTFUsersAnswer[i]);
GBC.gridx = 6;
gridbag.setConstraints(JTFRemainder[i],GBC);
mainPanel.add(JTFRemainder[i]);
GBC.gridy = 2*i-8;
gridbag.setConstraints(JLBIsTrue[i], GBC);
mainPanel.add(JLBIsTrue[i]);
}
mainPanel.setLayout(gridbag);
//布局命令面板
commandP.setLayout(new FlowLayout(FlowLayout.CENTER,60,20));
JLBRemainTime.setFont(JLBFont);
JLBTime.setFont(JLBFont);
JTFWtime.setFont(JTFFont);
PTime.setLayout(new FlowLayout(FlowLayout.LEFT,10,20));
PTime.add(JLBRemainTime);
PTime.add(JTFWtime);
PTime.add(JLBTime);
commandP.add(PTime);
JBStart.setFont(buttonFont);
commandP.add(JBStart);
JBRedo.setFont(buttonFont);
commandP.add(JBRedo);
JBOpenFile.setFont(buttonFont);
commandP.add(JBOpenFile);
//使用匿名嵌套类的方式注册开始按钮的事件处理监听器对象
JBStart.addActionListener(
new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(JBStart.getText().equals("开始做题"))
{
if(JTFUserName.getText().trim().equals(""))
{
JFrame nullNameWarning = new JFrame();
JOptionPane.showMessageDialog(nullNameWarning,"请输入用户名");//确保用户输入用户名
}
else{
start(); //如果按钮上面的文字是"开始做题"，则调用start()方法出题
JBStart.setText("提交答案");
//倒计时线程开始
LimitTime t = new LimitTime();
t.start();
}
}
else
{
for(int i = 0;i < 10;i++)
{
if(JTFUsersAnswer[i].getText().equals(""))
{
JTFUsersAnswer[i].setText("0");
}
}
runFlag = false;//将runFlag设置为false（线程就会不再执行while循环里的内容）
//printAnswer();//这里不用再调用printWriter方法了，因为线程那边结束的时候会对它进行调用。
JLBTime.setText("用时："+usedTime);
JBStart.setText("开始做题");
}
}
}
);
//监听重做按钮
JBRedo.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(JBStart.getText().equals("开始做题"))//若已提交答案 则可以进行重做
{
for(int i = 0;i < 10;i++)
{
JTFUsersAnswer[i].setText("");
JTFRemainder[i].setText("");
JLBAnswers[i].setText("");
JLBIsTrue[i].setText("");
JLBScores.setText("");
}
JLBTime.setText("用时：");
LimitTime t = new LimitTime();
t.start();
JBStart.setText("提交答案");
}
else//答案未提交 不能重做
{
JFrame notSubmit = new JFrame();
JOptionPane.showMessageDialog(notSubmit,"提交后才可以重做！提交前可以直接更改答案！");
}
}
});
//查看以往做题记录的按钮监听器
JBOpenFile.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(JTFUserName.getText().trim().equals(""))
{
JFrame nullNameWarning = new JFrame();
JOptionPane.showMessageDialog(nullNameWarning,"请输入用户名");//确保用户输入用户名
}
else{
//一般不能实例化一个Runtime对象，应用程序也不能创建自己的Runtime 类实例，但可以通过getRuntime 方法获取当前Runtime运行时对象的引用。一旦得到了一个当前的Runtime对象的引用，就可以调用Runtime对象的方法去控制Java虚拟机的状态和行为。
Runtime ce=Runtime.getRuntime();
pFile.mkdirs();
String filename = JTFUserName.getText()+".his";
File aUserRec = new File(pFile,filename);
if(aUserRec.exists())
{
try{
//ce.exec("cmd /c start "+aUserRec.getAbsolutePath());//这样是不能打开的 因为没有东西能打开.his文件 会跳出来搜索应用商店
ce.exec("notepad.exe "+aUserRec.getAbsolutePath());
}catch(IOException exc){
exc.printStackTrace();
}
}else{
JFrame nullFileWarning = new JFrame();
JOptionPane.showMessageDialog(nullFileWarning,"该用户暂无记录!");
}
}
}
});
//尽量把主窗体的设置都放到最后
mainWindow.add(selectPanel,BorderLayout.NORTH);
mainWindow.add(mainPanel,BorderLayout.CENTER);
mainWindow.add(commandP, BorderLayout.SOUTH);
mainWindow.pack();
mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainWindow.setSize(800,500);//设置窗体大小
mainWindow.setLocationRelativeTo(null);//将窗口置于屏幕中间
mainWindow.setVisible(true);//设置为可见 要放在最后 放在前面则只能看见用户名和选择面板 主面板等需要拖动窗口大小才能看见
}
public void start(){
//清除TextField和答案标签的内容
for(int i = 0;i < 10;i++)
{
JTFUsersAnswer[i].setText("");
JTFRemainder[i].setText("");
JLBAnswers[i].setText("");
JLBIsTrue[i].setText("");
JLBScores.setText("");
JLBTime.setText("用时：");
}
//获取ComboBox的选中值
chara = (String) JCBOperationSelect.getSelectedItem();
n = Integer.valueOf((String)JCBNumberOfDigit.getSelectedItem());
//根据选择的运算出题
int flag = 0;
if(chara.equals("混合"))
flag = 1;
for(int i = 0;i < 10;i++)
{
if(flag == 1)
{
int tempCh = (int)(Math.random()*4+1);
switch(tempCh)
{
case 1:
chara = "+";
break;
case 2:
chara = "-";
break;
case 3:
chara = "*";
break;
case 4:
chara = "/";
break;
}
}
switch(chara)
{
case "+":
questions[i] = new Addition(n);
JLBQuestions[i].setText(questions[i].printQuestion());
break;
case "-":
questions[i] = new Subtraction(n);
JLBQuestions[i].setText(questions[i].printQuestion());
break;
case "*":
questions[i] = new Multiplication(n);
JLBQuestions[i].setText(questions[i].printQuestion());
break;
case "/":
questions[i] = new Division(n);
JLBQuestions[i].setText(questions[i].printQuestion());
break;
default:
JFrame jf = new JFrame();
JOptionPane.showMessageDialog(jf,"出现未知错误，请重启程序。");
}
}
}
//在面板上显示每题的正确答案、得分和用时，并且将每次做题的记录写入文件
public void printAnswer()
{
//成绩初始值为100
scores = 100;
//对于每道题
for(int i = 0; i < 10;i++)
{
//给用户的答案这一数组赋值（getText的结果为String）
userAnswer[i] = Integer.valueOf(JTFUsersAnswer[i].getText());
//如果没有填余数，则默认用户认为余数为0，并给余数数组赋值
if(JTFRemainder[i].getText().equals(""))
{
remainder[i] = 0;
}
//否则用用户填的余数给余数数组赋值
else
{
remainder[i] = Integer.valueOf(JTFRemainder[i].getText());
}
//questions的类型是operation，用答案和余数这两个数组给questions这个数组赋值
questions[i].setUsersAnswer(userAnswer[i],remainder[i]);
//使正确答案显示在面板上
JLBAnswers[i].setText(questions[i].ptintQA());
//在面板上显示答案是否正确
JLBIsTrue[i].setText(questions[i].isCorrect());
//如果错误则将答案和是否正确两个标签的字体颜色设置为红色
if(JLBIsTrue[i].getText().equals("回答错误"))
{
JLBAnswers[i].setForeground(Color.RED);
JLBIsTrue[i].setForeground(Color.RED);
scores-=10;
}
//正确为黑色
else
{
JLBAnswers[i].setForeground(Color.BLACK);
JLBIsTrue[i].setForeground(Color.BLACK);
}
}
//显示成绩
JLBScores.setText("你的成绩为："+ scores);
//创建用户文件
pFile.mkdirs();
String filename = JTFUserName.getText()+".his";
File aUserRec = new File(pFile,filename);
if(! (aUserRec.exists()))
{
try{
aUserRec.createNewFile();
}catch(Exception e){
e.printStackTrace();
JFrame jf = new JFrame();
JOptionPane.showMessageDialog(jf,"用户文件创建失败");
}
}
//将每道题的正确答案和用户答案写入文件
for(int i = 0;i < 10;i++)
{
questions[i].writeToFile(aUserRec);
}
//将得分和用时写入文件
try
{
PrintWriter out = new PrintWriter(new FileWriter(aUserRec,true));
out.println("");
out.println("你此次的得分是："+scores+" "+"所用时间为："+usedTime+"秒");
out.println("");
out.println("");
out.close();
}catch(FileNotFoundException e){
System.err.println("File not found!" );
}catch(IOException e2){
e2.printStackTrace();
}
}
}
Operation.java
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
public abstract class Operation {
protected int op1,op2,remainder,usersRemainder,n,correctAnswer,usersAnswer,maxInt=1;
protected String ch;
protected long minRange,maxRange;
public Operation(String ch,int n) {
super();
this.ch = ch;
this.n = n;
}
public abstract void operation();
public abstract void isNumRight();
public abstract void setRange();
protected void getRanNum()
{
op1 = (int)(Math.random()*Math.pow(10,n));
op2 = (int)(Math.random()*Math.pow(10,n));
}
public void setUsersAnswer(int usersAnswer,int usersRemainder) //throws Exception
{
/*setRange();
if(usersAnswer < minRange || usersAnswer > maxRange)
throw new NumberTooBigException("答案范围应为"+minRange+"到"+maxRange);*/
this.usersAnswer = usersAnswer;
this.usersRemainder = usersRemainder;
}
public void setUsersAnswer(int usersAnswer) //throws Exception
{
setUsersAnswer(usersAnswer,0);
}
public String isCorrect()
{
if(usersAnswer == correctAnswer)
return "回答正确";
else
return "回答错误";
}
public String printQuestion()
{
getRanNum();
isNumRight();
return op1+" "+ch+" "+op2+" =";
}
public String ptintQA()
{
operation();
return "答案："+op1+" "+ch+" "+op2+" = "+correctAnswer;
}
public void writeToFile(File aFile)
{
try
{
PrintWriter out = new PrintWriter(new FileWriter(aFile,true));
out.println("题目："+op1+" "+ch+" "+op2);
out.println("你的答案："+usersAnswer + " "+ "正确答案："+correctAnswer);
out.close();
}catch(FileNotFoundException e){
System.err.println("File not found!" );
}catch(IOException e2){
e2.printStackTrace();
}
}
}
Addition.java
import szys.Operation;
public class Addition extends Operation {
static String ch = "+";
public Addition(int n) {
super(ch,n);
}
@Override
public void operation() {
correctAnswer = op1 + op2;
}
public void isNumRight(){}
public void setRange(){
minRange = 0;
maxRange = maxInt + maxInt;
}
}
Division.java
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import szys.Operation;
public class Division extends Operation {
static String ch = "/";
public Division(int n) {
super(ch,n);
}
@Override
public void operation() {
// TODO Auto-generated method stub
correctAnswer = op1 / op2;
remainder = op1 % op2;
}
public String isCorrect()
{
if(usersAnswer == correctAnswer && remainder == usersRemainder)
return "回答正确";
else
return "回答错误";
}
public String ptintQA()
{
operation();
return "答案："+op1+" "+ch+" "+op2+" = "+correctAnswer+" "+remainder;
}
@Override
public void isNumRight() {
while(op2 == 0)
getRanNum();
}
public void setRange(){
minRange = 0;
maxRange = maxInt;
}
public void writeToFile(File aFile)
{
try
{
PrintWriter out = new PrintWriter(new FileWriter(aFile,true));
out.println("题目："+op1+" "+ch+" "+op2);
out.println("你的答案："+usersAnswer+" "+usersRemainder + " "+ "正确答案："+correctAnswer+" "+remainder);
out.close();
}catch(FileNotFoundException e){
System.err.println("File not found!" );
}catch(IOException e2){
e2.printStackTrace();
}
}
}
Multiplication.java
import szys.Operation;
public class Multiplication extends Operation {
static String ch = "X";
public Multiplication(int n) {
super(ch,n);
}
@Override
public void operation() {
correctAnswer = op1 * op2;
}
@Override
public void isNumRight() {}
public void setRange(){
minRange = 0;
maxRange = maxInt * maxInt;
}
}
Subtraction.java
import szys.Operation;
public class Subtraction extends Operation{
static String ch = "-";
public Subtraction(int n) {
super(ch,n);
}
public void operation() {
correctAnswer = op1 - op2;
}
public void isNumRight(){
while(op1 == op2)
getRanNum();
if(op1 < op2)
{
int temp = op1;
op1 = op2;
op2 = temp;
}
}
public void setRange(){
minRange = -maxInt;
maxRange = maxInt;
}
}
运行结果：
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