第二次作业-JZTXT

[实验目的]

1.掌握软件开发的基本流程

2.掌握常用的软件开发方式和工具。

[实验内容]

1.设计一个包含登录界面的计算器软件，该软件可以实现第一次作业中的全部功能，同时可以保存用户的历史计算记录（保存数据最好使用数据库）。

[实验要求]

1.完成软件的UI设计、使用Visio设计软件中所涉及的所有流程图。

2.选择合适的集成开发环境和工具完成计算器软件的开发

3.将开发好软件进行测试并截图

4.将本次实验过程写成实验报告提交在本次作业的链接中

5.关键代码部分以代码块格式粘贴在实验报告正文中

6.软件架构以及开发技术不限

7.本次作业为个人作业，发现雷同作业一律按0分处理。

1.登录界面流程图

2.实现代码

<!DOCTYPE html>
<html>
<head>
  <title>计算器登录页面</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f1f1f1;
    }

    .container {
      width: 300px;
      margin: 100px auto;
      background-color: #fff;
      padding: 20px;
      border-radius: 5px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    h2 {
      text-align: center;
    }

    input[type="text"],
    input[type="password"] {
      width: 100%;
      padding: 10px;
      margin-bottom: 15px;
      border: 1px solid #ccc;
      border-radius: 3px;
    }

    input[type="submit"] {
      width: 100%;
      background-color: #4caf50;
      color: #fff;
      border: none;
      padding: 10px;
      border-radius: 3px;
      cursor: pointer;
    }

    input[type="submit"]:hover {
      background-color: #45a049;
    }
  </style>
</head>
<body>
  <div class="container">
    <h2>计算器登录</h2>
    <form action="calculator.html" method="post">
      <label for="username">用户名:</label>
      <input type="text" id="username" name="username" required>

      <label for="password">密码:</label>
      <input type="password" id="password" name="password" required>

      <input type="submit" value="登录">
    </form>
  </div>
</body>
</html>

3.登录作业

4.计算器流程图

5.计算器界面

6.历史记录

7.实现代码

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Calculator {

private JFrame frame; private JTextField textField;

private JButton btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btn0;

private JButton btnAdd, btnSubtract, btnMultiply, btnDivide, btnEquals, btnClear;

private double firstNumber; private String operator;

public Calculator() {

frame = new JFrame("Calculator");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(300, 400);

frame.setLayout(new BorderLayout());

textField = new JTextField();

textField.setHorizontalAlignment(JTextField.RIGHT);

JPanel panel = new JPanel();

panel.setLayout(new GridLayout(4, 4));

btn1 = new JButton("1");

btn2 = new JButton("2");

btn3 = new JButton("3");

btn4 = new JButton("4");

btn5 = new JButton("5");

btn6 = new JButton("6");

btn7 = new JButton("7");

btn8 = new JButton("8");

btn9 = new JButton("9");

btn0 = new JButton("0");

btnAdd = new JButton("+");

btnSubtract = new JButton("-");

btnMultiply = new JButton("*");

btnDivide = new JButton("/");

btnEquals = new JButton("=");

btnClear = new JButton("C");

panel.add(btn1);

panel.add(btn2);

panel.add(btn3);

panel.add(btnAdd);

panel.add(btn4);

panel.add(btn5);

panel.add(btn6);

panel.add(btnSubtract);

panel.add(btn7);

panel.add(btn8);

panel.add(btn9);

panel.add(btnMultiply);

panel.add(btn0);

panel.add(btnClear);

panel.add(btnEquals);

panel.add(btnDivide);

frame.add(textField, BorderLayout.NORTH);

frame.add(panel, BorderLayout.CENTER);

frame.setVisible(true);

btn1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

textField.setText(textField.getText() + "1");

} });

btn2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e)

{

textField.setText(textField.getText() + "2"); } }); // 添加其他按钮的监听器

btnAdd.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

firstNumber = Double.parseDouble(textField.getText());

operator = "+"; textField.setText(""); }

});

btnEquals.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

double secondNumber = Double.parseDouble(textField.getText());

double result = 0;

if (operator.equals("+")) {

result = firstNumber + secondNumber;

} else if (operator.equals("-"))

{ result = firstNumber - secondNumber;

} else if (operator.equals("*"))

{ result = firstNumber * secondNumber;

} else if (operator.equals("/"))

{ result = firstNumber / secondNumber;

}

textField.setText(String.valueOf(result)); }

});

btnClear.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

textField.setText("");

} });

} public static void main(String[] args) {

SwingUtilities.invokeLater(new Runnable() {

public void run() { new Calculator();

} });

}}

我们使用的算法思想是牛顿迭代法Q Qpackage package1 ;

import java.util .Scanner ;

public class t010fx {

public static void main(String args[])Scanner S = new Scanner (System. in);

System . out . pr intln("请输入一个你想开方的值int C = s.nextInt( );

double x1 ,X0 = C;

double fx = 2*x0;

x1 = x0 - (x0*x0-c)/fx;

while(Math.abs(x1-x0)>1e-16){

x0 = x1;

x1 = x0 - (x0*x0-c)/fx;

}