结对项目

这个作业属于哪个课程	https://edu.cnblogs.com/campus/gdgy/CSGrade22-12
这个作业要求在哪里	https://edu.cnblogs.com/campus/gdgy/CSGrade22-12/homework/13221
队伍成员	阿依努尔•麦麦提艾麦尔 3222004805 努日曼姑丽·阿卜来孜 3222004935
这个作业目标	实现一个自动生成小学四则运算题目的命令行程序
Github项目地址	https://github.com/3636492812/3636492812

PSP2.1	Personal Software Process Stages	预估耗时（分钟）	实际耗时（分钟）
Planning	计划	30	30
·Estimate	·估计这个任务需要多少时间	30	30
Development	开发	1010	1370
·Analysis	·需求分析（包括学习新技术）	50	40
·Design Spec	·生成设计文档	20	20
·Design Review	·设计复审	10	5
·Coding Standard	·代码规范（为目前的开发制定合适的规范）	10	15
·Design	·具体设计	30	40
·Coding	·具体编码	850	1150
·Code Review	·代码复审	30	60
·Test	·测试（自我测试，修改代码，提交修改）	10	40
Reporting	报告	65	75
·Test Repor	·测试报告	30	40
·Size Measurement	·计算工作量	15	10
·Postmortem & Process Improvement Plan	·事后总结，并提出过程改进计划	20	25
	合计	1475	1720

具体代码实现

public static void main(String[] args){
     Scanner sc= new Scanner(System.in);
     System.out.println("请输入产生几以内的数字：");
     range=sc.nextInt();
     System.out.println("请输入产生多少个运算表达式：");
     int num=sc.nextInt();
     int rightcount[]=new int[num+2];
     int wrongcount[]=new int[num+2];
     int right1=0;
    int wrong1=0;
    String[] results=new String[num];int i;
     for( i=0;i<num;i++){ 
          /*具体的功能如下面的代码（两个class除外）*/

}

生成题目：

String expArr[]=new String[2];//定义生成的题目
        int a= (int) (random.nextInt(range));//分子
        int b= (int) (random.nextInt(range));//分母
        int c= (int) (random.nextInt(range));//另一个分子
        int d= (int) (random.nextInt(range));//另一个分母
        int fuhao;//运算符
        fuhao= (int) (random.nextInt(4));
        if(b!=0&&d!=0) {//分母均不为0时生成带有分数的计算题，同时计算结果
        if(fuhao==0) {
            int fenzi=a*d+b*c;
            int fenmu=b*d;
            expArr[0]=biaodashi(a,b)+'+'+biaodashi(c,d)+'=';
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);
        
        }
        if(fuhao==1&&a*d-b*c>=0) {
            int fenzi=a*d-b*c;
            int fenmu=b*d;
            expArr[0]=biaodashi(a,b)+'-'+biaodashi(c,d)+'=';
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);
            
        }
        if(fuhao==1&&a*d-b*c<0) {
            int fenzi=b*c-a*d;
            int fenmu=b*d;
            expArr[0]=biaodashi(a,b)+'-'+biaodashi(c,d)+'=';
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);
            
        }
        if(fuhao==2) {
            int fenzi=a*c;
            int fenmu=b*d;
            expArr[0]=biaodashi(a,b)+'×'+biaodashi(c,d)+'=';
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);
            
        }
        if(fuhao==3&&c!=0) {
            int fenzi=a*d;
            int fenmu=b*c;
            expArr[0]=biaodashi(a,b)+'÷'+biaodashi(c,d)+'=';
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);
            
        }
        if(fuhao==3&&c==0) {
            break;
            /*c=1;
            int fenzi=a*d;
            int fenmu=b*c;
            expArr[0]=biaodashi(a,b)+'÷'+biaodashi(c,d)+'=';
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);*/
            
        }
        
        }
        else {//分母至少一个为0时生成只含有整式的运算式，同时计算结果
            b=1; d=1;
            if(fuhao==0) {
            int fenzi=a*d+b*c;
            int fenmu=b*d;
            expArr[0]=a+"+"+c+"=";
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);//计算结果
            
        }
        if(fuhao==1&&a*d-b*c>=0) {
            int fenzi=a*d-b*c;
            int fenmu=b*d;
            expArr[0]=a+"-"+c+"=";
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);//计算结果

            
        }
        if(fuhao==1&&a*d-b*c<0) {
            int fenzi=b*c-a*d;
            int fenmu=b*d;
            expArr[0]=c+"-"+a+"=";
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);//计算结果

            
        }
        if(fuhao==2) {
            int fenzi=a*c;
            int fenmu=b*d;
            expArr[0]=c+"×"+a+"=";
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);//计算结果

            
        }
        if(fuhao==3&&c!=0) {
            int fenzi=a*d;
            int fenmu=b*c;
            expArr[0]=a+"÷"+c+"=";
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);//计算结果

            
        }
        if(fuhao==3&&c==0) {
            break;//排除分母为零的情况
            /*c=1;
            int fenzi=a*d;
            int fenmu=b*c;
            expArr[0]=a+"÷"+c+"=";
            System.out.println(expArr[0]);
            results[i]=reductionofFraction(fenzi, fenmu);*/
            
        }

对分数的处理：

public static String reductionofFraction(int a, int b) {// 结果的分数约分，用于计算结果
        int y = 1;
        for (int i = a; i >= 1; i--) {
            if (a % i == 0 && b % i == 0) {
                y = i;
                break;
            }
        }
        int z = a / y;// 分子
        int m = b / y;// 分母
        if (z == 0) {
            return "0";
        }
        if(m==1) return z+"";
        else  return biaodashi(z,m);
        
    }
    public static String biaodashi(int a,int b) {//判断假分数，并化假分数为带分数
        if(a>=b) {
            int c;
            c=a/b;
            int d;
            d=a%b; 
            {if(d==0) {return c+"";}
            return c+"'"+d+"/"+b;}
        }return a+"/"+b;
    }

生成题目文件及答案文件：

FileWriter fw = null;
    try {
   
        File f=new File("Exersies.txt");//题目写入
        fw = new FileWriter(f, true);
    } catch (IOException e) {
        e.printStackTrace();
    }if(expArr[0]!=null) {
    PrintWriter pw = new PrintWriter(fw);
    pw.println(i+1+"."+expArr[0]);
    pw.flush();
    try {
        fw.flush();
        pw.close();
        fw.close();
    } catch (IOException e) {
        e.printStackTrace();
    }}FileWriter fn = null;
    try {
        
            File f=new File("Answer.txt");//答案写入
            fn = new FileWriter(f, true);
        } catch (IOException e) {
            e.printStackTrace();
        }if(expArr[0]!=null) {
        PrintWriter pn = new PrintWriter(fn);
        pn.println(i+1+"."+results[i]);
        pn.flush();
        try {
            fn.flush();
            pn.close();
            fn.close();
        } catch (IOException e) {
            e.printStackTrace();
        }}

统计并输出答题者的情况：

System.out.println("输入ok提交！");//答题完成后输入ok即可提交
     Scanner sc1=new Scanner(System.in);
     String submit=sc1.nextLine();
        if(submit.equals("ok")){
     String array[]=new String[num];
     try
        {   int k=0;
            
            FileReader fr = new FileReader("H://eclipse2//eclipse3//sizeyusuan//Your_answers.txt");
            BufferedReader br = new BufferedReader(fr);
            String s ;
            while((s = br.readLine())!=null) {//读取小学生的答案
                array[k]=s;    k++;
                }br.close();
            fr.close();        
            }catch(IOException e){
                System.out.println("指定文件不存在");
            }
    for(int j=0;j<num;j++){
         if(array[j].equals(results[j])) {//验证答案，统计正确和错误的个数
             
             rightcount[j]=j+1;
             right1++;
         }
         else {
             
             wrongcount[j]=j+1;
             wrong1++;
         }
     }
    FileWriter fg = null;
    try {
        //反馈正确与错误题目的信息
            File f=new File("Grade.txt");
            fg = new FileWriter(f, true);
        } catch (IOException e) {
            e.printStackTrace();
        }
        PrintWriter pg = new PrintWriter(fg);
        pg.println(" ");
        pg.print("Correct:"+right1+"(");
        for (int j = 0; j <= num; j++) {
            if (rightcount[j] != 0) {
                 pg.print(rightcount[j] + ",");
            }
        }
        pg.println(")");
        pg.print("Wrong:"+wrong1+"(");
        for (int j = 0; j <= num; j++) {
            if (wrongcount[j] != 0) {
                 pg.print(wrongcount[j] + ",");
            }
        }
        pg.print(")");
        pg.flush();
        try {
            fg.flush();
            pg.close();
            fg.close();
        } catch (IOException e) {
            e.printStackTrace();
        }}

测试运行

题目文件