java记——随机数

问题及代码：

问题：
随机生成两个数字，计算他们的差值
代码：
import java.util.Scanner;

public class question {
	public static void main(String[] args) {
		int number1=(int)(Math.random()*10);
		int number2=(int)(Math.random()*10);
		if(number1<number2)
		{
			int temp=number1;
			number1=number2;
			number2=temp;
		}
		System.out.print("what is "+number1+"-"+number2+"?");
		Scanner input=new Scanner(System.in);
		int answer=input.nextInt();
		if(number1-number2==answer)
			System.out.println("You are correct!");
		else
			System.out.println("Your answer is wrong\n"+number1+"-"+number2+" should be "+(number1-number2));
	}
}

运行结果：