编写Java程序，显示五个加减法测验的正确率和用时

最新推荐文章于 2022-03-18 14:08:52 发布

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最新推荐文章于 2022-03-18 14:08:52 发布 · 1.1k 阅读

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本文介绍了如何使用Java编写一个程序，该程序提供五个加减法测验，并记录用户的答题正确率及完成测验所花费的时间，帮助用户了解自己的计算速度和准确度。

代码如下：

package com.nfsbbs.test;

import java.util.Scanner;

public class MathsTest {
	
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        final int MAX = 20; 
        final int MUST_SOLVE = 5;
        int a, b;
        double crt = 0;
        double rate;
        
        double startTime, endTime;
        double sec;

        System.out.println("Maths Test\n");
        System.out.println("You need to correctly solve addition problems as quickly as you can. ");
        System.out.println("You must answer " + MUST_SOLVE + " correctly before the test will end. ");
        System.out.println("The operand values will be between 1 and " + MAX + ". \n");
        System.out.println("Press ENTER to start the test. ");
        
        sc.nextLine();
        startTime = System.currentTimeMillis();
        
        for(int solve = 1; solve <= MUST_SOLVE; solve++) {
        	a = (int) (Math.ra