2023/11/7 每日总结

今天完成了软件构造课后作业

请完善课上的口算题卡代码，实现重复题目的检测、题目数字范围、加减乘除算式的参数化等扩展功能，提交代码和运行截图。

import java.util.HashSet;
import java.util.Random;
import java.util.Scanner;
import java.util.Set;

public class Test {
    private static Set<String> question_set=new HashSet<>();
    public static void main(String[] args) {
            try {
                System.out.println("请输入算术题个数");
                Scanner scanner = new Scanner(System.in);
                int n = scanner.nextInt();
                System.out.println("请输入数的范围");
                int bound=scanner.nextInt();
                System.out.println("请输入1.加减 2.乘除3.加减乘除");
                int op=scanner.nextInt();
                pratice(n,bound,op);
                print();
            } catch (Exception e){
                e.printStackTrace();
            }
    }
    public static String operator(int op){

        Random random = new Random();
        int r = random.nextInt(100);
        if(op==1){
            switch (r%2){
                case 0:
                    return "+";
                case 1:
                    return "-";

            }
        }
        if(op==2){
            switch (r%2){
                case 0:
                    return "*";
                case 1:
                    return "/";

            }
        }
        if(op==3){
            switch (r%4){
                case 0:
                    return "+";
                case 1:
                    return "-";
                case 2:
                    return "*";
                case 3:
                    return "/";
            }
        }

        return "";
    }
    public static void pratice(int n,int bound,int opeartor){
        try {
            while(true){
                if(question_set.size()==n){
                    break;
                }
                Random random = new Random();
                int left = random.nextInt(bound);
                int right=random.nextInt(bound);
                String s=left+operator(opeartor)+right+"=";
                if(!question_set.contains(s)){
                    question_set.add(s);
                }else {
                    continue;
                }
            }


        }catch (Exception e){
            System.out.println("你的输入参数出现了问题，请重新输入");
        }
    }
    public static void print(){
        for (String s :question_set){
            System.out.println(s);
        }

    }
}