小学生四则运算
2021/9/27 23:43:35
本文主要是介绍小学生四则运算，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
PSP：
| psp | 任务内容 | 计划完成需要的时间（min） | 实际完成需要的时间（min） |
|---|---|---|---|
| Planning | 计划 | 30 | 40 |
| Estimate | 估计这个任务需要多少时间，并规划大致工作步骤 | 30 | 20 |
| Development | 开发 | 120 | 150 |
| Analysis | 需求分析（包括学习新技术） | 45 | 20 |
| Design Spec | 生成设计文档 | 20 | 0 |
| Coding Standard | 代码规范 | 10 | 10 |
| Design | 具体设计 | 15 | 22 |
| Coding | 具体编码 | 40 | 35 |
| Code Review | 代码复审 | 10 | 1 |
| Test | 测试（自我测试，修改代码，提交修改） | 20 | 20 |
| Reporting | 报告 | 10 | 10 |
| Test Report | 测试报告 | 15 | 10 |
代码：
package text;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class Chuti{
public static void main (String args[]) {
new WinJFrame();
}
}
class WinJFrame extends JFrame{
public WinJFrame(){
setBounds(400,200,600,400);
setTitle("小学生四则运算练习器");
setLayout(null);
Container con = getContentPane();
con.setBackground(new Color(255,218,185));
init();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public int getPlus(String s) {
String regex = "[^0123456789.]+";
s=s.replaceAll(regex, "#");
StringTokenizer fenxi = new StringTokenizer(s,"#");
int sum = 0;
while(fenxi.hasMoreTokens()) {
String item = fenxi.nextToken();
int h =Integer.parseInt(item);
sum = sum + h;
}
return sum;
}
public int getMinus(String s) {
String regex = "[^0123456789.]+";
s=s.replaceAll(regex, "#");
StringTokenizer fenxi = new StringTokenizer(s,"#");
int sum = 0;
int ss[];
ss=new int[2];
for(int i=0;fenxi.hasMoreTokens();i++)
{
String item = fenxi.nextToken();
ss[i]=Integer.parseInt(item);
}
sum=ss[0]-ss[1];
return sum;
}
public int getMultiply(String s) {
String regex = "[^0123456789.]+";
s=s.replaceAll(regex, "#");
StringTokenizer fenxi = new StringTokenizer(s,"#");
int sum = 0;
int ss[];
ss=new int[2];
for(int i=0;fenxi.hasMoreTokens();i++)
{
String item = fenxi.nextToken();
ss[i]=Integer.parseInt(item);
}
sum=ss[0]*ss[1];
return sum;
}
public int getDivision(String s) {
String regex = "[^0123456789.]+";
s=s.replaceAll(regex, "#");
StringTokenizer fenxi = new StringTokenizer(s,"#");
int sum = 0;
int ss[];
ss=new int[2];
for(int i=0;fenxi.hasMoreTokens();i++)
{
String item = fenxi.nextToken();
ss[i]=Integer.parseInt(item);
}
sum=ss[0]/ss[1];
return sum;
}
void init() {
JButton b[] = new JButton[12];
for(int k=0;k<12;k++) {
b[k] = new JButton();
add(b[k]);
}
b[0].setBounds(20,20,100,30);
b[0].setText("加法");
b[1].setBounds(460,20,100,30);
b[1].setText("换题");
b[2].setBounds(20,60,100,30);
b[2].setText("确认答案");
b[3].setBounds(20,100,100,30);
b[3].setText("减法");
b[4].setBounds(460,100,100,30);
b[4].setText("换题");
b[5].setBounds(20,140,100,30);
b[5].setText("确认答案");
b[6].setBounds(20,180,100,30);
b[6].setText("乘法");
b[7].setBounds(460,180,100,30);
b[7].setText("换题");
b[8].setBounds(20,220,100,30);
b[8].setText("确认答案");
b[9].setBounds(20,260,100,30);
b[9].setText("除法");
b[10].setBounds(460,260,100,30);
b[10].setText("换题");
b[11].setBounds(20,300,100,30);
b[11].setText("确认答案");
JTextArea ja0 = new JTextArea();
JTextArea ja1 = new JTextArea();
JTextArea ja2 = new JTextArea();
JTextArea ja3 = new JTextArea();
ja0.setBounds(120, 20, 340, 30);
ja0.setFont(new Font("黑体",Font.BOLD,30));
add(ja0);
ja1.setBounds(120, 100, 340, 30);
ja1.setFont(new Font("黑体",Font.BOLD,30));
add(ja1);
ja2.setBounds(120, 180, 340, 30);
ja2.setFont(new Font("黑体",Font.BOLD,30));
add(ja2);
ja3.setBounds(120, 260, 340, 30);
ja3.setFont(new Font("黑体",Font.BOLD,30));
add(ja3);
JTextField jt0 = new JTextField();
JTextField jt1 = new JTextField();
JTextField jt2 = new JTextField();
JTextField jt3 = new JTextField();
jt0.setBounds(120, 60, 340, 30);
jt0.setFont(new Font("黑体",Font.BOLD,30));
add(jt0);
jt1.setBounds(120, 140, 340, 30);
jt1.setFont(new Font("黑体",Font.BOLD,30));
add(jt1);
jt2.setBounds(120, 220, 340, 30);
jt2.setFont(new Font("黑体",Font.BOLD,30));
add(jt2);
jt3.setBounds(120, 300, 340, 30);
jt3.setFont(new Font("黑体",Font.BOLD,30));
add(jt3);
for(int j=0;j<2;j++) {
b[j].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int number1,number2;
number1=(int)Math.ceil(Math.random()*100);
number2=(int)Math.ceil(Math.random()*100);
ja0.setText(number1+"+"+number2+"=");
}
});
}
for(int j=3;j<5;j++) {
b[j].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int number1,number2;
number1=(int)Math.ceil(Math.random()*100);
number2=(int)Math.ceil(Math.random()*100);
ja1.setText(number1+"-"+number2+"=");
}
});
}
for(int j=6;j<8;j++) {
b[j].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int number1,number2;
number1=(int)Math.ceil(Math.random()*100);
number2=(int)Math.ceil(Math.random()*100);
ja2.setText(number1+"*"+number2+"=");
}
});
}
for(int j=9;j<11;j++) {
b[j].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int number1,number2;
number1=(int)Math.ceil(Math.random()*100);
number2=(int)Math.ceil(Math.random()*100);
ja3.setText(number1+"/"+number2+"=");
}
});
}
b[2].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(getPlus(ja0.getText())==Integer.parseInt(jt0.getText())){
JOptionPane.showMessageDialog(jt0,"答案正确","判定结果",JOptionPane.INFORMATION_MESSAGE);
}
else{
JOptionPane.showMessageDialog(jt0,"答案错误","判定结果",JOptionPane.WARNING_MESSAGE);
}
}
});
b[5].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(getMinus(ja1.getText())==Integer.parseInt(jt1.getText())){
JOptionPane.showMessageDialog(jt1,"答案正确","判定结果",JOptionPane.INFORMATION_MESSAGE);
}
else{
JOptionPane.showMessageDialog(jt1,"答案错误","判定结果",JOptionPane.WARNING_MESSAGE);
}
}
});
b[8].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(getMultiply(ja2.getText())==Integer.parseInt(jt2.getText())){
JOptionPane.showMessageDialog(jt2,"答案正确","判定结果",JOptionPane.INFORMATION_MESSAGE);
}
else{
JOptionPane.showMessageDialog(jt2,"答案错误","判定结果",JOptionPane.WARNING_MESSAGE);
}
}
});
b[11].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(getDivision(ja3.getText())==Integer.parseInt(jt3.getText())){
JOptionPane.showMessageDialog(jt3,"答案正确","判定结果",JOptionPane.INFORMATION_MESSAGE);
}
else{
JOptionPane.showMessageDialog(jt3,"答案错误","判定结果",JOptionPane.WARNING_MESSAGE);
}
}
});
}
}
测试：
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