加法器 :由系统产生随机数并由用户输入答案 若输入值为0则结束最后计算总分 每次答对加10分

package Java_Beginners;

import java.util.Scanner;

public class Caculator {

public static void main(String[] args) {
	int answer = -1;//初始化变量 
	int score = 0;
	Scanner s = new Scanner(System.in);
	for (int i = 0; i < 5 && answer != 0; i++) {
		int a = (int) ((Math.random() * 10) + 1);
		int b = (int) ((Math.random() * 10) + 1);//有系统产生两个10以内的随机整数
		int x = a + b;//由系统计算 a+b的值
		System.out.println(a + "+" + b + "=");
		answer = s.nextInt();//由系统获取用户输入 
		if (answer == x) {
			System.out.println("恭喜您答对了");
			score = score + 10;
		} else if (answer == 0) {
			System.out.println("放弃答题");
		} else {
			System.out.println("很遗憾您答错了希望您再接再励");
		}
	}System.out.println();
	System.out.println("您最后的得分是:"+score+"分");

}

}