diff --git a/src/java2022spring/CalculatorStart.java b/src/java2022spring/CalculatorStart.java
new file mode 100644
index 0000000000000000000000000000000000000000..6b1ac621f88b6d731aa49b3062abb035ece099a2
--- /dev/null
+++ b/src/java2022spring/CalculatorStart.java
@@ -0,0 +1,312 @@
+package java2022spring;
+
+import javax.swing.*;
+import java2022spring.Science;
+import java.awt.*;
+import java.awt.event.*;
+	
+	@SuppressWarnings("unused")
+	public class CalculatorStart {
+		public static void main(String[] args) {
+			new Jisuan();
+		}
+	}
+	@SuppressWarnings("serial")
+	class Jisuan extends JFrame implements ActionListener{
+		JPanel Panel;
+		JTextField Text;
+		JMenuBar menubar;
+		public Jisuan(){
+			this.setTitle("标准计算器");                                       //设置窗口标题
+			this.setSize(350,450);                                          //设置窗口大小
+			this.setLayout(new BorderLayout());                             //设置布局方式
+			this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);            //当点击关闭窗口时退出程序
+			this.setLocationRelativeTo(null);                               //窗口出现位置固定在正中央
+			this.setResizable(true);                                        //窗体大小可以被用户改变
+			Text=new JTextField(15);
+			Text.setHorizontalAlignment(JTextField.RIGHT);                  //计算器显示数字的文本框内容右对齐
+			Text.setFont(new Font("TimesRoman",Font.BOLD,30));              //设置文本框字体样式及大小
+			Text.setEditable(false);                                       //文本框不可编辑
+			Text.setBackground(Color.WHITE);
+			this.add(Text,BorderLayout.NORTH);                             //将文本框放至窗口北部
+			
+			//**********************************设置菜单栏************************************
+			JMenuBar menubar=new JMenuBar();			
+		    JMenu menu2=new JMenu("选择");
+			JMenu menu3=new JMenu("帮助");
+			menubar.add(menu2);
+		    menubar.add(menu3);
+		    this.setJMenuBar(menubar);
+		    //设置菜单栏下的菜单项
+		    JMenuItem biaozhunItem=new JMenuItem("标准计算器");
+		    JMenuItem kexueItem=new JMenuItem("科学计算器");
+		    JMenuItem shiyongItem=new JMenuItem("使用说明");
+		    menu2.add(biaozhunItem);                                  //在编辑菜单栏中添加标准计算器菜单项
+		    menu2.add(kexueItem);                                     //在编辑菜单栏中添加科学计算器菜单项
+		    kexueItem.addActionListener(new ActionListener() {        //设置点击科学计算器弹出科学计算器窗口          
+		    	public void actionPerformed(ActionEvent arg0) {
+					ScienceJisuan kexue = new ScienceJisuan();
+					kexue.setVisible(true);
+					}
+		    }
+		    );
+		    menu3.add(shiyongItem);                                    //在帮助菜单栏中添加使用说明菜单项
+		    shiyongItem.addActionListener(new ActionListener() {
+		    	public void actionPerformed(ActionEvent e) {
+		    		JFrame use=new JFrame("使用说明");
+		    		use.setSize(350,340);
+		    		use.setResizable(false);
+		    		use.setLocationRelativeTo(null); 
+		    		JTextArea useText=new JTextArea("感谢您使用本计算器。\n操作说明：\n（1）点击编辑可以选择你想要的计算器类型;\n"
+		    				+ "（2）点击按钮开始运算。\n按钮功能说明：\n（1）+为加号，-为减号，×为乘号，÷为除号，+/-为当\n前数字的正负转换；\n（2）BACK退格，C清空；\n"
+		    				+ "（3）%除以一百，sqrt取平方根，²平方，³立方，1/x\n取倒数；\n（4）MS存储记忆当前数字，MC清空存储数字，MR呈\n现存储数字，"
+		    				+ "M+将存储数字与当前数字相加，M-将存\n储数字与当前数字相减；\n（5）sin正弦函数，cos余弦函数，tan正切函数，lg以\n十为底的对数，exp是e的n次方；"
+		    				+ "");
+		    		useText.setFont(new Font("TimesRoman",Font.BOLD,13));    
+		    		use.add(useText);
+		    		use.setVisible(true);
+		    	}
+		    });
+		    
+			//************************************设置按钮**************************************
+			JButton button[]=new JButton[28];			
+			button[0]=new JButton("MC");		
+			button[1]=new JButton("MR");	
+			button[2]=new JButton("MS");		
+			button[3]=new JButton("M+");   
+			button[4]=new JButton("%");
+			button[5]=new JButton("sqrt");
+			button[6]=new JButton("²");
+			button[7]=new JButton("1/x");  
+			button[8]=new JButton("BACK");
+			button[9]=new JButton("C");
+			button[10]=new JButton("³");
+			button[11]=new JButton("÷");  
+			button[12]=new JButton("7");
+			button[13]=new JButton("8");
+			button[14]=new JButton("9");
+			button[15]=new JButton("×");  
+			button[16]=new JButton("4");	
+			button[17]=new JButton("5");
+			button[18]=new JButton("6");  
+			button[19]=new JButton("-");
+            button[20]=new JButton("1");
+            button[21]=new JButton("2");
+            button[22]=new JButton("3");
+            button[23]=new JButton("+");
+            button[24]=new JButton("+/-");
+            button[25]=new JButton("0");
+            button[26]=new JButton(".");
+            button[27]=new JButton("=");
+            for(int i=4;i<=27;i++) {
+				button[i].setBackground(Color.WHITE);                //设置按钮颜色
+				button[i].setForeground(Color.BLACK);
+				button[i].setFont(new Font("",Font.PLAIN,15));       //设置按钮字体大小
+			}
+			//设置按钮布局
+		    Panel=new JPanel();
+		    Panel.setLayout(new GridLayout(7,4));		    
+		    for(int i=0;i<=27;i++) {
+		    	Panel.add(button[i]);
+		    }		    
+		    this.add(Panel);            //添加面板至窗口
+		    this.setVisible(true);		//显示面板内容	 		    	    	
+		    for(int i=0;i<=27;i++)      //定义监听器
+		    	button[i].addActionListener(this);
+		    this.setVisible(true);      	    
+		}
+		private StorageField storage=new StorageField();     //存储区
+		private StringBuilder getnum=new StringBuilder();
+		double num1,num2,num3;
+		double sum=0;
+		int a;
+		//设置按钮功能
+		public void actionPerformed(ActionEvent e) {			
+			String str=e.getActionCommand();
+			if(str.equals("0"))
+			{
+				getnum.append("0");                      //0
+			Text.setText(getnum.toString());				
+			}
+			else if(str.equals("1"))                  //1
+			{
+				getnum.append("1");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("2"))                  //2
+			{
+				getnum.append("2");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("3"))                  //3
+			{
+				getnum.append("3");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("4"))                  //4
+			{
+				getnum.append("4");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("5"))                  //5
+			{
+				getnum.append("5");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("6"))                  //6
+			{
+				getnum.append("6");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("7"))                  //7
+			{
+				getnum.append("7");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("8"))                  //8
+			{
+				getnum.append("8");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("9"))                  //9
+			{
+				getnum.append("9");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("."))                  //.
+			{
+				getnum.append(".");
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("BACK"))                 //按下CE退格
+			{
+				getnum.deleteCharAt(getnum.length()-1);
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("C"))                  //按下C清空
+			{
+				getnum=new StringBuilder();
+				Text.setText(getnum.toString());
+			}
+			else if(str.equals("+"))                  //+
+			{a=1;
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			Text.setText("+");
+			}			
+			else if(str.equals("-"))                  //-
+			{a=2;
+				num1=Double.parseDouble(Text.getText());
+				getnum=new StringBuilder();
+				Text.setText("-");	
+			}
+			else if(str.equals("×")) {                //×
+				num1=Double.parseDouble(Text.getText());
+				a=3;
+				getnum=new StringBuilder();
+				Text.setText("×");
+			}
+			else if(str.equals("÷")) {                //÷
+				num1=Double.parseDouble(Text.getText());
+				a=4;
+				getnum=new StringBuilder();
+				Text.setText("÷");
+			}
+			else if(str.equals("%")) {				  //取百分数
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			sum=num1/100;
+			Text.setText(sum+"");
+			}
+			else if(str.equals("²")) {               //平方
+				num1=Double.parseDouble(Text.getText());
+				getnum=new StringBuilder();
+				Text.setText(num1*num1+"");
+				sum=num1*num1;
+			}
+			else if(str.equals("³")) {              //立方
+				num1=Double.parseDouble(Text.getText());
+				getnum=new StringBuilder();
+				Text.setText(num1*num1*num1+"");
+				sum=num1*num1*num1;
+			}
+			else if(str.equals("sqrt")) {           //开根
+				num1=Double.parseDouble(Text.getText());
+				getnum=new StringBuilder();
+				Text.setText(Math.sqrt(num1)+"");	
+				sum=Math.sqrt(num1);
+			}
+			else if(str.equals("1/x")) {            //倒数
+				num1=Double.parseDouble(Text.getText());
+				getnum=new StringBuilder();
+				if(num1==0) {
+					Text.setText(num1+"不能求倒数");
+				}else {
+					Text.setText(1/num1+"");
+					sum=1/num1;
+				}
+			}
+				else if(str.equals("+/-")) {         //正负转换
+					num1=Double.parseDouble(Text.getText());
+					getnum=new StringBuilder();
+					if(num1>0) {
+					sum=-num1;
+					Text.setText(sum+"");
+					}
+					else if(num1<0) {
+						sum=-num1;
+						Text.setText(sum+"");
+					}
+				}
+			
+			else if(str.equals("=")) {               //按=实现算法
+				num2=Double.parseDouble(Text.getText());
+				if(a==1) {
+					sum=num1+num2;
+					Text.setText(sum+"");
+				}
+				else if(a==2){
+					sum=num1-num2;
+					Text.setText(sum+"");
+				}
+				else if(a==3) {
+					sum=num1*num2;
+					Text.setText(sum+"");
+				}
+				else if(a==4) {
+					sum=num1/num2;
+					Text.setText(sum+"");
+				}				
+			}
+			else if(str.equals("MC")) {              //清空存储区
+				storage.StorageJudge=true;
+				storage.StorageNum=0;
+			}
+			else if(str.equals("MR")) {              //显示存储区存储数
+			storage.StorageJudge=true;
+			Text.setText(storage.StorageNum+"");				
+			}
+			else if(str.equals("MS")){               //存储文本框内的数
+		    num3=Double.parseDouble(Text.getText());
+			storage.StorageNum=num3;
+			}
+			else if(str.equals("M+")) {              //将存储数加上文本框内的数
+		   storage.StorageJudge=true;
+		   num3=Double.parseDouble(Text.getText());
+		   storage.StorageNum+=num3;
+			}
+			}
+class StorageField{
+public double StorageNum;         //存储数据
+public boolean StorageJudge;      //是否启动存储区
+public StorageField(){
+	StorageNum=0;
+	StorageJudge=false;
+}
+}
+}
+	
+		
+		
+		
+	
\ No newline at end of file
diff --git a/src/java2022spring/Science.java b/src/java2022spring/Science.java
new file mode 100644
index 0000000000000000000000000000000000000000..600294b329d11a7a6f616ecff20665ed75ef38dd
--- /dev/null
+++ b/src/java2022spring/Science.java
@@ -0,0 +1,364 @@
+package java2022spring;
+
+import javax.swing.*;
+
+import java2022spring.CalculatorStart;
+
+import java.awt.*;
+import java.awt.event.*;
+
+@SuppressWarnings("unused")
+public class Science{
+	public static void main(String[] args) {
+		new ScienceJisuan();
+}
+}
+@SuppressWarnings("serial")
+class ScienceJisuan extends JFrame implements ActionListener{
+	JPanel Panel;
+	JPanel Panel2;
+	JTextField Text;
+	JMenuBar menubar;
+	public ScienceJisuan(){
+		this.setTitle("科学计算器");                                       //设置窗口标题
+		this.setSize(450,450);                                          //设置窗口大小
+		this.setLayout(new BorderLayout());                             //设置布局方式
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);            //当点击关闭窗口时退出程序
+		this.setLocationRelativeTo(null);                               //窗口出现位置固定在正中央
+		this.setResizable(true);                                        //窗体大小可以被用户改变
+		Text=new JTextField(15);
+		Text.setHorizontalAlignment(JTextField.RIGHT);                  //计算器显示数字的文本框内容右对齐
+		Text.setFont(new Font("TimesRoman",Font.BOLD,30));              //设置文本框字体样式及大小
+		Text.setEditable(false);
+		Text.setBackground(Color.WHITE);
+		this.add(Text,BorderLayout.NORTH);                             //将文本框放至窗口北部
+		
+		//**********************************设置菜单栏************************************
+		JMenuBar menubar=new JMenuBar();
+	    JMenu menu2=new JMenu("选择");
+		JMenu menu3=new JMenu("帮助");
+		menubar.add(menu2);
+	    menubar.add(menu3);
+	    this.setJMenuBar(menubar);
+	    //设置菜单栏下的菜单项
+	    JMenuItem biaozhunItem=new JMenuItem("标准计算器");
+	    JMenuItem kexueItem=new JMenuItem("科学计算器");
+	    JMenuItem shiyongItem=new JMenuItem("使用说明");
+	    menu2.add(biaozhunItem);                                  //在编辑菜单栏中添加标准计算器菜单项
+	    menu2.add(kexueItem);                                     //在编辑菜单栏中添加科学计算器菜单项
+	    biaozhunItem.addActionListener(new ActionListener() {        //设置点击标准计算器弹出科学计算器窗口          
+	    	public void actionPerformed(ActionEvent arg0) {
+				Jisuan biaozhun = new Jisuan();
+				biaozhun.setVisible(true);
+				}
+	    }
+	    );
+	    menu3.add(shiyongItem);                                    //在帮助菜单栏中添加使用说明菜单项
+	    shiyongItem.addActionListener(new ActionListener() {
+	    	public void actionPerformed(ActionEvent e) {
+	    		JFrame use=new JFrame("使用说明");
+	    		use.setSize(350,340);
+	    		use.setResizable(false);
+	    		use.setLocationRelativeTo(null); 
+	    		JTextArea useText=new JTextArea("感谢您使用本计算器。\n操作说明：\n（1）点击编辑可以选择你想要的计算器类型;\n"
+	    				+ "（2）点击按钮开始运算。\n按钮功能说明：\n（1）+为加号，-为减号，×为乘号，÷为除号，+/-为当\n前数字的正负转换；\n（2）BACK退格，C清空；\n"
+	    				+ "（3）%除以一百，sqrt取平方根，²平方，³立方，1/x\n取倒数；\n（4）MS存储记忆当前数字，MC清空存储数字，MR呈\n现存储数字，"
+	    				+ "M+将存储数字与当前数字相加，M-将存\n储数字与当前数字相减；\n（5）sin正弦函数，cos余弦函数，tan正切函数，lg以\n十为底的对数，exp是e的n次方；"
+	    				+ "");
+	    		useText.setFont(new Font("TimesRoman",Font.BOLD,13));    
+	    		use.add(useText);
+	    		use.setVisible(true);
+	    	}
+	    });
+	    
+		//************************************设置第一个面板的按钮**************************************
+		JButton button[]=new JButton[28];			
+		button[0]=new JButton("MC");		
+		button[1]=new JButton("MR");	
+		button[2]=new JButton("MS");		
+		button[3]=new JButton("M+");   
+		button[4]=new JButton("%");
+		button[5]=new JButton("sqrt");
+		button[6]=new JButton("²");
+		button[7]=new JButton("1/x");  
+		button[8]=new JButton("BACK");
+		button[9]=new JButton("C");
+		button[10]=new JButton("³");
+		button[11]=new JButton("÷");  
+		button[12]=new JButton("7");
+		button[13]=new JButton("8");
+		button[14]=new JButton("9");
+		button[15]=new JButton("×");  
+		button[16]=new JButton("4");	
+		button[17]=new JButton("5");
+		button[18]=new JButton("6");  
+		button[19]=new JButton("-");
+        button[20]=new JButton("1");
+        button[21]=new JButton("2");
+        button[22]=new JButton("3");
+        button[23]=new JButton("+");
+        button[24]=new JButton("+/-");
+        button[25]=new JButton("0");
+        button[26]=new JButton(".");
+        button[27]=new JButton("=");
+        for(int i=4;i<=27;i++) {
+			button[i].setBackground(Color.WHITE);                //设置按钮颜色
+			button[i].setForeground(Color.BLACK);
+			button[i].setFont(new Font("",Font.PLAIN,15));       //设置按钮字体大小
+		}
+		//设置按钮布局
+	    Panel=new JPanel();
+	    Panel.setLayout(new GridLayout(7,4));		    
+	    for(int i=0;i<=27;i++) {
+	    	Panel.add(button[i]);
+	    	button[i].addActionListener(this);
+	    }	   
+	    this.add(Panel);            //添加面板至窗口		 		    	    	
+	    //*****************************设置第二个面板的按钮（科学计算器新增）**************************************
+	    JButton button2[]=new JButton[7];
+	    button2[0]=new JButton("M-");		
+		button2[1]=new JButton("sin");	
+		button2[2]=new JButton("cos");		
+		button2[3]=new JButton("tan");   
+		button2[4]=new JButton("lg");
+		button2[5]=new JButton("exp");
+		button2[6]=new JButton("π"); 
+		Panel2=new JPanel();
+		Panel2.setLayout(new GridLayout(7,1));
+		for(int i=0;i<=6;i++) {
+		Panel2.add(button2[i]);
+		button2[i].addActionListener(this);
+	}
+		this.add(Panel2,BorderLayout.EAST);
+		this.setVisible(true);	
+	}
+	private StorageField storage=new StorageField();     //存储区
+	private StringBuilder getnum=new StringBuilder();
+	double num1,num2,num3;
+	double sum=0;
+	int a=0;
+	//设置按钮功能
+	public void actionPerformed(ActionEvent e) {			
+		String str=e.getActionCommand();		
+		if(str.equals("0"))
+		{getnum.append("0");                      //0
+		Text.setText(getnum.toString());				
+		}
+		else if(str.equals("1"))                  //1
+		{
+			getnum.append("1");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("2"))                  //2
+		{
+			getnum.append("2");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("3"))                  //3
+		{
+			getnum.append("3");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("4"))                  //4
+		{
+			getnum.append("4");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("5"))                  //5
+		{
+			getnum.append("5");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("6"))                  //6
+		{
+			getnum.append("6");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("7"))                  //7
+		{
+			getnum.append("7");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("8"))                  //8
+		{
+			getnum.append("8");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("9"))                  //9
+		{
+			getnum.append("9");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("."))                  //.
+		{
+			getnum.append(".");
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("π"))
+		{getnum.append("3.141592653589793");
+		Text.setText(getnum.toString());
+		}
+		
+	    if(str.equals("BACK"))                 //按下CE退格
+		{
+			getnum.deleteCharAt(getnum.length()-1);
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("C"))                  //按下C清空
+		{
+			getnum=new StringBuilder();
+			Text.setText(getnum.toString());
+		}
+		else if(str.equals("+"))                  //+
+		{
+			a=1;
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();
+		Text.setText("+");	
+		}
+		else if(str.equals("-"))                  //-
+		{a=2;
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			Text.setText("-");	
+		}
+		else if(str.equals("×")) {                //×
+			num1=Double.parseDouble(Text.getText());
+			a=3;
+			getnum=new StringBuilder();
+			Text.setText("×");
+		}
+		else if(str.equals("÷")) {                //÷
+			num1=Double.parseDouble(Text.getText());
+			a=4;
+			getnum=new StringBuilder();
+			Text.setText("÷");
+		}
+		else if(str.equals("%")) {				  //取百分数
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();
+		sum=num1/100;
+		Text.setText(sum+"");
+		}
+		else if(str.equals("²")) {               //平方
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			Text.setText(num1*num1+"");
+			sum=num1*num1;
+		}
+		else if(str.equals("³")) {              //立方
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			Text.setText(num1*num1*num1+"");
+			sum=num1*num1*num1;
+		}
+		else if(str.equals("sqrt")) {           //开根
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			Text.setText(Math.sqrt(num1)+"");	
+			sum=Math.sqrt(num1);
+		}
+		else if(str.equals("1/x")) {            //倒数
+			num1=Double.parseDouble(Text.getText());
+			getnum=new StringBuilder();
+			if(num1==0) {
+				Text.setText(num1+"不能求倒数");
+			}else {
+				Text.setText(1/num1+"");
+				sum=1/num1;
+			}
+		}
+			else if(str.equals("+/-")) {         //正负转换
+				num1=Double.parseDouble(Text.getText());
+				getnum=new StringBuilder();
+				if(num1>0) {
+				sum=-num1;
+				Text.setText(sum+"");
+				}
+				else if(num1<0) {
+					sum=-num1;
+					Text.setText(sum+"");
+				}
+			}
+		
+		else if(str.equals("=")) {               //按=实现算法
+			num2=Double.parseDouble(Text.getText());
+			if(a==1) {
+				sum=num1+num2;
+				Text.setText(sum+"");
+			}
+			else if(a==2){
+				sum=num1-num2;
+				Text.setText(sum+"");
+			}
+			else if(a==3) {
+				sum=num1*num2;
+				Text.setText(sum+"");
+			}
+			else if(a==4) {
+				sum=num1/num2;
+				Text.setText(sum+"");
+			}				
+		}
+		else if(str.equals("MC")) {              //清空存储区
+		storage.StorageJudge=true;
+		storage.StorageNum=0;
+		}
+		else if(str.equals("MR")) {              //显示存储区存储数
+		storage.StorageJudge=true;
+		Text.setText(storage.StorageNum+"");				
+		}
+		else if(str.equals("MS")){               //存储文本框内的数
+	    num3=Double.parseDouble(Text.getText());
+		storage.StorageNum=num3;
+		}
+		else if(str.equals("M+")) {              //将存储数加上文本框内的数
+	    storage.StorageJudge=true;
+	    num3=Double.parseDouble(Text.getText());
+	    storage.StorageNum+=num3;
+		}
+		else if(str.equals("M-")) {
+	    storage.StorageJudge=true;
+	    num3=Double.parseDouble(Text.getText());
+	    storage.StorageNum-=num3;
+		}
+		else if(str.equals("sin")) {
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();
+		sum=Math.sin(num1);
+		Text.setText(sum+"");
+		}
+		else if(str.equals("cos")) {
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();
+		sum=Math.cos(num1);
+		Text.setText(sum+"");
+		}
+		else if(str.equals("tan")) {
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();
+		sum=Math.tan(num1);
+		Text.setText(sum+"");
+		}
+		else if(str.equals("lg")) {
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();
+		sum=Math.log10(num1);
+		Text.setText(sum+"");
+		}
+		else if(str.equals("exp")) {
+		num1=Double.parseDouble(Text.getText());
+		getnum=new StringBuilder();	
+		sum=Math.exp(num1);
+		Text.setText(sum+"");
+		}
+		}
+class StorageField{
+public double StorageNum;         //存储数据
+public boolean StorageJudge;      //是否启动存储区
+public StorageField(){
+StorageNum=0;
+StorageJudge=false;
+}
+}
+}
\ No newline at end of file