《个人软件开发流程》——申同燕

1.需求分析：

根据用户输入的题目个数，产生含有2个数字，1种运算符的题目，并显示出来。

2.核心代码：

package entity;

import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.function.BiFunction;

/**
 * 试卷实体类
 */
public class Exam {

    private List<Subject> subjectList;

    public List<Subject> getSubjectList() {
        return subjectList;
    }

    public void setSubjectList(List<Subject> subjectList) {
        this.subjectList = subjectList;
    }

    public Exam() {
        System.out.println("请输入要生成几道题目：");
        Scanner sc = new Scanner(System.in);
        int count = sc.nextInt();
        List<Subject> list = new ArrayList<Subject>();
        BiFunction<Integer, Integer, Integer> add = (x, y) -> x + y;
        BiFunction<Integer, Integer, Integer> minus = (x, y) -> x - y;
        BiFunction<Integer, Integer, Integer> multiple = (x, y) -> x * y;
        BiFunction<Integer, Integer, Integer> divide = (x, y) -> x / y;
        for (int i = 0; i < count; i++) {
            Subject subject = new Subject();
            Integer a = new Random().nextInt(99);
            Integer b = new Random().nextInt(99);
            subject.setA(a);
            subject.setB(b);
            subject.setIndex(i + 1);
            Integer symbol = new Random().nextInt(3);
            if (symbol == 0) {
                subject.setSymbol("+");
                subject.setAnswer(add.apply(a, b));
            } else if (symbol == 1) {
                subject.setSymbol("-");
                subject.setAnswer(minus.apply(a, b));
            } else if (symbol == 2) {
                subject.setSymbol("×");
                subject.setAnswer(multiple.apply(a, b));
            } else if (symbol == 3) {
                subject.setSymbol("÷");
                subject.setAnswer(divide.apply(a, b));
            }
            list.add(subject);
        }
        this.subjectList = list;

    }

    public static void main(String[] args) {
        Exam exam = new Exam();// 随机出题
        
        // 查看试卷
        exam.getSubjectList().forEach(subject -> {
            System.out.println("第" + subject.getIndex() + "题：" + subject.getA() + " " + subject.getSymbol() + " "
                    + subject.getB() +"=");
        });
        System.out.println("输出你的答案，每题答案之间用空格分开：");
        System.out.println();
        Scanner sc = new Scanner(System.in);
        int count = sc.nextInt();
        System.out.println("-----------*答案为*----------");
        exam.getSubjectList().forEach(subject -> {
            System.out.println("第" + subject.getIndex() + "题答案："+ subject.getAnswer());
        });
    }

}

/**
 * 定义题目的类
 *
 */
class Subject {

    private Integer index;

    private Integer a;

    private Integer b;

    private String symbol;

    private Integer answer;

    public Integer getIndex() {
        return index;
    }

    public void setIndex(Integer index) {
        this.index = index;
    }

    public Integer getA() {
        return a;
    }

    public void setA(Integer a) {
        this.a = a;
    }

    public Integer getB() {
        return b;
    }

    public void setB(Integer b) {
        this.b = b;
    }

    public String getSymbol() {
        return symbol;
    }

    public void setSymbol(String symbol) {
        this.symbol = symbol;
    }

    public Integer getAnswer() {
        return answer;
    }

    public void setAnswer(Integer answer) {
        this.answer = answer;
    }

}

 

3.PSP对照表

PSP	任务内容	计划共完成需要的时间(min)	实际完成需要的时间(min)
Planning	计划	25	30
Estimate	· 估计这个任务需要多少时间，并规划大致工作步骤	25	30
Development	开发	248	323
·Analysis	·分析需求	15	20
·Design Spec	·生成设计文档	20	25
·Design Review	·设计复审	8	10
·Coding Standard	·代码规范	5	3
·Design	·具体设计	25	30
·Coding	·具体编码	120	160
·Code Review	·代码复审	30	45
·Test	·测试	25	30
Record Time Spent	记录用时	27	31
Test Report	测试报告	15	17
Size Measurement	计算工作量	7	8
Postmorterm	事后总结	5	6

 

4.总结

   具体编码与代码复审较为费时间，许多方法都忘记了，具体编码环节估计和实践差距太大了。总体来说，磕磕绊绊写完了。还是要多加练习。