小组成员:时圣玉 张承雷

使用了 html,css,js

实现四则运算，输入 题目的数量，点击Create，产生相应数量的题目，清除，可以清除所有的题目和分数

源码： var Answer = []; var Test = []; // var btn = document.getElementsByClassName('clearAll')[0]; // var Create = document.getElementsByClassName('Create')[0]; // var Input = document.getElementsByClassName('number')[0]; // var rightNumBox = document.getElementsByClassName('rightNum')[0]; var rightNum = 0; // var center = document.getElementsByClassName('center')[0]; // Create.onclick = function(){ // if(Input.value > 0){ // Render(Input.value); // } // } // btn.onclick = clear; function Render(num){ clear() var questions = document.getElementsByClassName('questions')[0]; getRandomTest(num); var str = ""; Test.forEach(function(ele,index){ str += '

'+ele+'

'; }) console.log(str) questions.innerHTML = str; str = ""; bindBtn(num); } function clear(){ var questions = document.getElementsByClassName('questions')[0]; questions.innerHTML = ""; Test = []; Answer = []; rightNum = 0; rightNumBox.innerText = '正确数量：'+ rightNum; }

function bindBtn(num){ var isresult = document.getElementsByClassName('isresult'); var answer = document.getElementsByClassName('answer'); for(var i = 0;i < num;i ++){ answer[i].setAttribute('data-index',i); answer[i].onblur = function(){ var oldValue = ""; if(this.value != '' && oldValue != this.value){ oldValue = this.value; if(Answer[this.getAttribute('data-index')] == parseInt(this.value)){ rightNum ++; this.disabled = true; isresult[this.getAttribute('data-index')].innerText = '正确'; isresult[this.getAttribute('data-index')].style.color = 'green'; rightNumBox.innerText = '正确数量：'+ rightNum }else{ isresult[this.getAttribute('data-index')].innerText = '错误'; isresult[this.getAttribute('data-index')].style.color = 'red'; } } } } }

function getRandomTest(num){ var add = 0; var sub = 0; var mul = 0; var div = 0; var random; for(var i = 0;i < num;i ++){ random = Math.floor((Math.random()*4)+1); if(random == 1){ add ++; }else if(random == 2){ sub ++; }else if(random == 3){ mul ++; }else{ div ++; } } handleArr(getTest(add,'add')); handleArr(getTest(sub,'sub')); handleArr(getTest(mul,'mul')); handleArr(getTest(div,'div')); }

function handleArr(arr){ var arr1 = arr.slice(0,arr.length/2); var arr2 = arr.slice(arr.length/2,arr.length); for(var i = 0;i < arr1.length;i ++){ Test.push(arr1[i]); Answer.push(arr2[i]); } return Test; }

function getRandom(){ return Math.floor((Math.random()*100)+1); }

function getTest(num,sigal){ var arr = []; var answer = []; var first; var second; var str = ''; while(arr.length < num){ first = getRandom(); second = getRandom(); if(sigal=='add' && first + second <= 100 ){ str = "" + first+' + ' + second; arr.push(str) answer.push(first + second) } if(sigal == 'mul' && first * second <= 100){ str = '' + first + ' * ' + second; arr.push(str) answer.push(first * second) } if(sigal == 'sub'){ str = '' + Math.max(first,second) + ' - ' + Math.min(first,second); arr.push(str) answer.push(Math.abs(first - second)); } if(sigal == 'div' && Math.max(first,second)%Math.min(first,second) == 0 && Math.min(first,second)!=1 && first!=second){ var a = Math.max(first,second); var b = Math.min(first,second) str = '' + a + ' / ' + b; arr.push(str) answer.push(a/b); } } return arr.concat(answer); } module.exports = { getRandom, getTest, handleArr }

测试代码：

var math = require('../math.js'); var assert = require('assert') describe('测试math.js',function(){

describe('生成随机数',function(){
    it('随机数',function(){
        console.log(math.getRandom())
        // console.log(math.getTest(10,'+'))
    })
});
describe('生成加运算',function(){
    it('加运算以及答案',function(){
        console.log(math.getTest(10,'add'))
    })
});
describe('将题目和答案分开',function(){
    it('将题目和答案分开',function(){
        console.log(math.handleArr([1,2,3,4,5,6]))
    })
});

})

测试math.js 生成随机数 99 √ 随机数 生成加运算 [ '16 + 9', '85 + 6', '9 + 59', '38 + 22', '39 + 2', '44 + 38', '38 + 46', '5 + 86', '39 + 16', '60 + 12', 25, 91, 68, 60, 41, 82, 84, 91, 55, 72 ] √ 加运算

测试math.js 测试minus方法 89

  将题目和答案分开

[ 1, 2, 3 ] √ 将题目和答案分开

3 passing (16ms)