《软件集成开发环境》第一次作业
1.设计一个可实现加、减、乘、除功能的计算器软件
2.使用牛顿迭代法完成算术开方的运算
3.将自己编写的算术开方功能集成到计算器程序中，使计算器软件除了具备加、减、乘、除功能外，还具备算术开方功能
二、实验要求
1.完成计算器软件的UI设计、使用Visio设计计算器软件中所涉及的流程图。
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
三、具体实验步骤
1,画出流程图
2，根据流程图编写代码
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;
}
System. out.println(C+"开方的结果是"+X1);}此时的运算结果如下:
四，总结:经过本次实验，熟练掌握了软件开发的基本流程，软件设计和开发的基本工具，对集成软件开发环境在软件开发过程中的作用有了更深入的理解。