标签：自动 报错 文本框 java ase 同事 reporting 输入参数 设计
操作数：
符号：
分隔符：
生成10k条表达式的时间为0.5-0.7s左右，
100k为4-5s左右，
1000k为47s-50s左右。
从用时上看基本是符合线性复杂度的。
这么花时间的最要原因是随机生成的表达式合法率不高，
是因为表达式生成为随机的，最后还加了判断答案本身和答案的分母是否有超过限制r，不通过则直接舍弃，所以合法的表达式并不多。
如果仅判断答案是否小于0，则100k为1s，1000k为7-8s，少了80%的时间，合法表达式会多很多，基本没有冲突。
不过如果仅生成1w条，则输出时间会比表达式生成的时间多，所以0.5s感觉还可以接受。。不过有优化空间
//是否插入括号
int flag = r1.nextInt(2);
//随机生成1-3个运算符
int computeNum = r1.nextInt(3);
switch (computeNum) {
case 0:
expression.append(s[0] + " " + ch[0] + " " + s[1]);
break;
case 1:
if (flag == 1) {
//括号插入位置随机
int index = r1.nextInt(2);
if (index == 0) {
expression.append(
"(" + " " + s[0] + " " + ch[0] + " " + s[1] + " " + ")" + " " + ch[1] + " " + s[2]);
} else {
expression.append(
s[0] + " " + ch[0] + " " + "(" + " " + s[1] + " " + ch[1] + " " + s[2] + " " + ")");
}
} else {
expression.append(s[0] + " " + ch[0] + " " + s[1] + " " + ch[1] + " " + s[2]);
}
break;
case 2:
if (flag == 1) {
//括号插入位置随机
int index = r1.nextInt(6);
switch (index) {
case 0:
expression.append("(" + " " + s[0] + " " + ch[0] + " " + s[1] + " " + ")" + " " + ch[1]
+ " " + "(" + " " + s[2] + " " + ch[2] + " " + s[3] + " " + ")");
break;
case 1:
expression.append("(" + " " + s[0] + " " + ch[0] + " " + s[1] + " " + ")" + " " + ch[1]
+ " " + s[2] + " " + ch[2] + " " + s[3]);
break;
case 2:
expression.append("(" + " " + s[0] + " " + ch[0] + " " + s[1] + " " + ch[1] + " " + s[2]
+ " " + ")" + " " + ch[2] + " " + s[3]);
break;
case 3:
expression.append(s[0] + " " + ch[0] + " " + "(" + " " + s[1] + " " + ch[1] + " " + s[2]
+ " " + ")" + " " + ch[2] + " " + s[3]);
break;
case 4:
expression.append(s[0] + " " + ch[0] + " " + "(" + " " + s[1] + " " + ch[1] + " " + s[2]
+ " " + ch[2] + " " + s[3] + " " + ")");
break;
case 5:
expression.append(s[0] + " " + ch[0] + " " + s[1] + " " + ch[1] + " " + "(" + " " + s[2]
+ " " + ch[2] + " " + s[3] + " " + ")");
break;
default:
expression.append(" ");
}
} else {
expression.append(
s[0] + " " + ch[0] + " " + s[1] + " " + ch[1] + " " + s[2] + " " + ch[2] + " " + s[3]);
}
break;
default:
expression.append(" ");
}
//GUI中确定按钮监听
ok.addActionListener(e -> {
if (n.getText().equals("please enter the parameter n") || r.getText().equals("please enter the parameter r")) {
JOptionPane.showMessageDialog(null, "请输入参数!");
} else {
PrintWriter out_exp = null;
try {
out_exp = new PrintWriter("Exercise.txt");
} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
PrintWriter out_ans = null;
try {
out_ans = new PrintWriter("Answers.txt");
} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
Solve.Build(Integer.parseInt(r.getText()), Integer.parseInt(n.getText()), out_exp, out_ans);
out_exp.close();
out_ans.close();
out_exp.flush();
String filepath = System.getProperty("user.dir") + "/Exercise.txt";
File file = new File(filepath);
try {
BufferedReader input = new BufferedReader(new InputStreamReader(
new FileInputStream(file)));
jTextArea1.read(input, "READING FILE :-)");
} catch (Exception ee) {
ee.printStackTrace();
}
}
});
//GUI中检查按钮的监听
check.addActionListener(e1 -> {
PrintWriter Grade = null;
try {
Grade = new PrintWriter("Grade.txt");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//将输入的答案写入inputAnswers文件中
StringTokenizer st = new StringTokenizer(jTextArea2.getText(), "\n");
FileWriter inputAnswers = null;
try {
inputAnswers = new FileWriter("inputAnswers.txt");
} catch (IOException e) {
e.printStackTrace();
}
while (st.hasMoreTokens()) {
try {
inputAnswers.append(st.nextToken() + "\r\n");
} catch (IOException e) {
e.printStackTrace();
}
}
try {
inputAnswers.close();
} catch (IOException e) {
e.printStackTrace();
}
Scanner in_exp = null;
try {
in_exp = new Scanner(Paths.get("Exercise.txt"));
} catch (IOException e) {
e.printStackTrace();
}
;
Scanner in_ans = null;
try {
in_ans = new Scanner(Paths.get("inputAnswers.txt"));
} catch (IOException e) {
e.printStackTrace();
}
Solve.check(in_exp, in_ans, Grade);
in_exp.close();
in_ans.close();
Grade.close();
//把Grade的内容以消息框显示出来
String filepath = System.getProperty("user.dir") + "/Grade.txt";
File file = new File(filepath);
String s;
StringBuilder str = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
while ((s = br.readLine()) != null) {
str.append(s);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
JOptionPane.showMessageDialog(null, str.toString());
});
//GUI中查看答案按钮的监听
display.addActionListener(e -> {
//把题目和标准答案整合成一个文件
PrintWriter exerciseAndAnswer = null;
try {
exerciseAndAnswer = new PrintWriter("exerciseAndAnswer.txt");
} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
String E;
String A;
String filepath = System.getProperty("user.dir") + "/Exercise.txt";
File file = new File(filepath);
String filepath1 = System.getProperty("user.dir") + "/Answers.txt";
File file1 = new File(filepath1);
try {
BufferedReader inputE = new BufferedReader(new FileReader(file));
BufferedReader inputA = new BufferedReader(new FileReader(file1));
while ((E = inputE.readLine()) != null && (A = inputA.readLine()) != null) {
StringBuilder s = new StringBuilder();
s.append(E + " " + A);
exerciseAndAnswer.println(s.toString());
}
} catch (Exception ee) {
ee.printStackTrace();
}
exerciseAndAnswer.close();
//读取
String filepath2 = System.getProperty("user.dir") + "/exerciseAndAnswer.txt";
File file2 = new File(filepath2);
try {
BufferedReader input = new BufferedReader(new InputStreamReader(
new FileInputStream(file2)));
jTextArea1.read(input, "READING FILE :-)");
} catch (Exception ee) {
ee.printStackTrace();
}
});
public class Pair {
public Pair add(Pair b) {}// +
public Pair dec(Pair b) {}// -
public Pair mul(Pair b) {}// *
public Pair div(Pair b) {}// /
public boolean compare(Pair b) {}// >=
}
public class Solve {
// 将随机生成的表达式转化为后缀表达式，用于后续计算
public static String to_suf(String expression) {}
// 计算后缀表达式 并返回运算顺序
public static Pair calculate(String expression, StringBuilder cal) {}
// check答案
public static void check() {}
// 生成n个表达式，范围为r
public static void Build(int r, int n, PrintWriter out_exp, PrintWriter out_ans) {
//使用hash_set判重
HashSet<String> st = new HashSet<String>();
for (int i = 0; i < n; ++i) {
StringBuilder cal = new StringBuilder("");
String expression = Builder.get_expression(r);
if (expression.equals(" ")) {
System.out.println("Error");
return;
}
Pair ans = calculate(expression, cal);
if (ans.isLessZero() || st.contains(cal.toString())) {
i--;
continue;
}
st.add(cal.toString());
out_exp.println((i + 1) + "." + expression + " =");
out_ans.println(ans.toString());
}
}
}
| PSP2.1 | Personal Software Process Stages | 预估耗时（分钟） | 实际耗时（分钟） |
|---|---|---|---|
| Planning | 计划 | ||
| · Estimate | · 估计这个任务需要多少时间 | 20 | 25 |
| Development | 开发 | ||
| · Analysis | · 需求分析 (包括学习新技术) | 420 | 500 |
| · Design Spec | · 生成设计文档 | 20 | 30 |
| · Design Review | · 设计复审 (和同事审核设计文档) | 40 | 35 |
| · Coding Standard | · 代码规范 (为目前的开发制定合适的规范) | 15 | 10 |
| · Design | · 具体设计 | 35 | 40 |
| · Coding | · 具体编码 | 540 | 600 |
| · Code Review | · 代码复审 | 50 | 55 |
| · Test | · 测试（自我测试，修改代码，提交修改） | 90 | 100 |
| Reporting | 报告 | ||
| · Test Report | · 测试报告 | 20 | 30 |
| · Size Measurement | · 计算工作量 | 20 | 15 |
| · Postmortem & Process Improvement Plan | · 事后总结, 并提出过程改进计划 | 30 | 25 |
| 合计 | 1300 | 1465 |
郑梓淳
1.由于之前已经做过wc个人项目，所以这次做起来比较顺手，比如工具的使用等
2.题目生成中括号的插入是直接手动拼接的，如果运算符的个数是随机的，这种做法显然不行，有取巧的成分
3.第一次做GUI，只实现功能，界面的布局较简陋
4.结对的感受：此次的项目交流，除了讨论分工外，其余都是我在问结对伙伴问题，感谢大佬带飞。结对的好处是可以做自己擅长的方面，这样效率会比较高。
张强
1.刚接触java，很多地方不熟悉，感觉怎么写怎么报错，很麻烦。不过确实比c++方便。
2.写的時候不够认真，很多地方不够严谨，会出现除0，没化简等情况，都是在后面的测试里找到的问题，改了改又交上git了，提交的次数感觉比较多。
3.结对的感受：互相监督会比较有意愿去学习，遇到问题也可以相互讨论。GUI啥的伙伴很主动去学习，遇到问题也会尽量找方法解决，后面测试找到很多bug，很认真，牛。
标签：自动 报错 文本框 java ase 同事 reporting 输入参数 设计
原文地址：https://www.cnblogs.com/zhengzichun/p/12678483.html
