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：
标签：总结,theFirstNumber,int,每日,symbol,nextInt,theSecondNumber,public,10.16 From： https://www.cnblogs.com/2351920019xin/p/17768300.html