本文共 1939 字，大约阅读时间需要 6 分钟。
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.random() * MAX + 1); b = (int) (Math.random() * MAX + 1); System.out.println("\nWhat is " + a + " + " + b + "? "); if(sc.nextInt() == (a + b)) { System.out.println("CORRECT! "); crt++; } else { System.out.println("WRONG! "); } } rate =crt / MUST_SOLVE * 100; endTime = System.currentTimeMillis(); sec = (endTime - startTime) / 1000; System.out.println("\n\nYour rating is " + rate + "%. \nAnd you took " + sec + " sceonds. "); System.out.println("\nSee you next time. "); }} 输出： Maths TestYou need to correctly solve addition problems as quickly as you can. You must answer 5 correctly before the test will end. The operand values will be between 1 and 20. Press ENTER to start the test. What is 6 + 6? 12CORRECT! What is 4 + 20? 24CORRECT! What is 5 + 9? 14CORRECT! What is 10 + 4? 14CORRECT! What is 2 + 13? 21WRONG! Your rating is 80.0%. And you took 10.419 sceonds. See you next time.
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