我的作业要求我做一个数学游戏,在该数学游戏中,我提示用户回答数学问题,然后向他们显示答案。我已经创建了MathGame
类,但是当我创建MathGame
的实例时,它要求我放入两个整数,我不知道这两个整数是因为我试图随机生成它们。
问题:如何从类中获取随机数以传递到MathGame
实例?
下面是MathGame
类
在下面,我试图弄清楚MathGame
实例的主要含义。
import java.util.Random;
public class MathGame {
private int operand1;
private int operand2;
private int solution;
public MathGame(int operand1, int operand2) {
this.operand1 = operand1;
this.operand2 = operand2;
}
public int genRandom1() {
Random rand = new Random();
int randNum = rand.nextInt(0) + 20;
randNum = operand1;
return operand1;
}
public int genRandom2() {
Random rand = new Random();
int randNum2 = rand.nextInt(0) + 20;
randNum2 = operand2;
return operand2;
}
public int getoperand1() {
return operand1;
}
public int getoperand2() {
return operand2;
}
public String question() {
return "What is" + operand1 + operand2 + "?";
}
public String solution() {
int solution = operand1 + operand2;
return "The correct answer is: " + solution;
}
}
我在MathGame实例中遇到错误,因为我需要经历两个整数,但是我显然不知道这些整数,因为它们应该是随机生成的,这是我在课堂上所做的。
import java.util.Scanner;
public class MathGameMain {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
MathGame game1 = new MathGame();
}
}
最佳答案
您可能想要更改为以下内容:
import java.util.Random;
public class MathGame {
private int operand1;
private int operand2;
private int solution;
public MathGame ()
{
this.operand1 = getRandom();
this.operand2 = getRandom();
}
public int getRandom()
{
Random rand = new Random();
int randNum = rand.nextInt(20);
return randNum;
}
public int getoperand1()
{
return operand1;
}
public int getoperand2()
{
return operand2;
}
public String question()
{
return "What is" + operand1 + " + " + operand2 + "?";
}
public String solution()
{
int solution = operand1 + operand2;
return "The correct answer is: " + solution;
}
}
初始化MathGame时,应生成随机数。如果您要随机生成数字,则无需传递数字。