10.16每日总结

今天完成了软件构造的作业，代码如下：

package calculation;

import java.util.Random;



public class Equation {

    private int theFirstNumber;

    private int theSecondNumber;

    private String symbol;



    public Equation(int maxNumber, boolean allowMultiplicationDivision) {

        Random random = new Random();

        this.theFirstNumber = random.nextInt(maxNumber - 9) + 10; 

        this.theSecondNumber = random.nextInt(maxNumber - 9) + 10;



        if (allowMultiplicationDivision) {

            int randomOperator = random.nextInt(4);

            switch (randomOperator) {

                case 0:

                    this.symbol = "+";

                    break;

                case 1:

                    this.symbol = "-";

                    break;

                case 2:

                    this.symbol = "*";

                    break;

                case 3:

                    this.symbol = "/";

                    break;

            }

        } else {

            int randomOperator = random.nextInt(2);

            switch (randomOperator) {

                case 0:

                    this.symbol = "+";

                    break;

                case 1:

                    this.symbol = "-";

                    break;

            }

        }

    }



    public int getTheFirstNumber() {

        return theFirstNumber;

    }



    public void setTheFirstNumber(int theFirstNumber) {

        this.theFirstNumber = theFirstNumber;

    }



    public int getTheSecondNumber() {

        return theSecondNumber;

    }



    public void setTheSecondNumber(int theSecondNumber) {

        this.theSecondNumber = theSecondNumber;

    }



    public String getSymbol() {

        return symbol;

    }



    public void setSymbol(String symbol) {

        this.symbol = symbol;

    }



    @Override

    public String toString() {

        return theFirstNumber + " " + symbol + " " + theSecondNumber +" =" + " " ;

    }

}

package calculation;

import java.util.Scanner;

import java.util.HashSet;



public class Compute {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);



        // 获取用户输入，确定是否包括乘除法

        System.out.print("是否包括乘除法（0代表没有仅有加减法，1代表有加减法也有乘除法）: ");

        int allowMultiplicationDivision = scanner.nextInt();



        // 获取用户输入，确定计算数的范围最大值

        System.out.print("请输入计算数的范围最大值: ");

        int maxNumber = scanner.nextInt();



        // 获取用户输入，确定出题的个数

        System.out.print("请输入出题的个数（最多为50个）: ");

        int numQuestions = scanner.nextInt();



        // 检查出题的个数是否超过上限

        if (numQuestions > 50) {

            System。out.println("出题的个数不能超过50。");

            return;

        }



        // 创建 Equation 对象的数组，用于存储生成的题目

        Equation[] equations = new Equation[numQuestions]；

        HashSet<String> uniqueEquations = new HashSet<>(); // 用于存储唯一的题目字符串



        int generatedQuestions = 0;



        // 生成题目并确保它们不重复

        while (generatedQuestions <》 numQuestions) {

            Equation newEquation = new Equation(maxNumber, allowMultiplicationDivision == 1);

            String equationString = newEquation.toString();



            if (!uniqueEquations.contains(equationString)) {

                equations[generatedQuestions] = newEquation;

                uniqueEquations.add(equationString);

                generatedQuestions++;

            }

        }



        // 输出生成的题目

        System.out.println("生成的题目如下：");

        for (int i = 0; i < numQuestionns; i++) {

            System.out.print(equations[i]);

            if ((i + 1) % 4 == 0) {

                System.out.println();

            } else {

                System.out.print("\t");

            }

        }

        System.out.println(" ");

        System.out.println("现在可以开始做题了。");

    }

}

项目结构：