软件构造-生成的算式及习题长期保存

package ruanjiangouzao;
import java.awt.image.BufferedImage;
import java.io.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Random;
import java.util.Scanner;
public class four {

    static int num;
    static String []s=new String [100];
    public static void main(String args[]){
        //设置连接的路径
        File writeFile=new File("C:\\Users\\qiu\\Desktop\\tiku.csv");
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入存储的题目个数:");
        int n= sc.nextInt();

        try {
            //通过BufferedReader类创建一个使用默认大小输出缓冲区的缓冲字符输出流
            BufferedWriter writer=new BufferedWriter(new FileWriter(writeFile));
            writer.write("题目"+",标准答案");
            writer.newLine();

            for (int i=0;i<n;i++){
                String w=creat();
                if (test(w,i)){
                    continue;  //如果重复就跳过循环，不进行存入
                }
                writer.write(w+","+num);
                writer.newLine();
            }

            writer.flush();
            writer.close();
        } catch (FileNotFoundException  e) {
           System.out.println("写入失败");
        }catch (IOException e){
            System.out.println("写入成功");
        }
    }
    //创建运算式题目
    public static String creat(){
        int x,y,z;
        Random rand=new Random();
        x= rand.nextInt(100)+1;
        y=rand.nextInt(100)+1;
        z=rand.nextInt(50)+1;
        String str="";
        if (z%2==0){
            num=x+y;
            str=x+"+"+y;
            return str;
        }else {
            num=x-y;
            str=x+"-"+y;
            return str;
        }
    }
        //判断算式是否重复，包括反向的重复
    public static boolean test(String w,int i){
        String w1=new StringBuffer(w).reverse().toString();
        for (int j=0;j<i;j++){
            if (w.equals(s[j])&&w1.equals(s[j])){
                return true;
            }
        }
        return false;
    }

}

 

还是尚硅谷的老师讲的好

我胖虎又回来听了

不过为啥要歧视大学生~~

我们真的有学习~~~~

不过，这hadoop的历史也许不用讲这老些节课