GitHub: https://github.com/m8705/Arithmometer
Project elaboration
In this project, We are required to actualize a command line program for automatically generating four arithmetic problems for primary schools.
Now the project is still in progress, we have so far finished exercise judgement, and soon we will update more information.
Team members: Wu Tang Huang, Zhang Guo Jun
Detail description
Program usage
Generate exercise file:
node e.js -n 10 -r 10
Validate exercise:
node e.js -e exercisefile.txt -a answerfile.txt
Parameter and regulation
1. Use -n parameter to control the number of generated questions（1~10000）.
2. Use -r parameter to control the range of numeric value (natural number, true fraction and true fraction denominator) in the title（1~100）.
3. The calculation process in the generated problem does not produce a negative number, that is, if there is a sub-expression in the arithmetic expression, such as e1 - e2, then e1 < e2
4. If there is a subexpression e1 ÷ e2 in the generated exercise, the result should be true score.
5. There are no more than 3 operators in each problem.
6. The problem generated by the program running at one time can not be repeated, that is, any two problems can not be transformed into the same problem by the finite number of exchange + and * arithmetic expressions.The generated problem is stored in the Exercises.txt file under the current directory of the execution program.
7. At the same time, the answers to all the questions are computed and stored in the Answers.txt file in the current directory of the execution program.
8. The program should support the generation of ten thousand problems.
9. Program support for a given question file and answer file, determine the right and wrong answers and statistics, statistics output to the file Grade.txt
Code preview
?1 //console.log(process.argv); ?2 ??3 var arg1 = process.argv[2]; ?4 var arg2 = process.argv[3]; ?5 var arg3 = process.argv[4]; ?6 var arg4 = process.argv[5]; ?7 ??8 if( (arg1 === "-n") && (arg3 === "-r") ){//生成题目 ?9 ?????10 ????arg2 = Math.floor(arg2);//取整 11 ????if( arg2 > 0 && arg2 <= 10000 ){ 12 ?????????13 ????????arg4 = Math.floor(arg4);//取整 14 ????????if( arg4 > 0 && arg4 <= 100 ){ 15 ?????????????16 ????????????produce(arg2,arg4); 17 ?????????????18 ????????} 19 ????????else{ 20 ?????????????21 ????????????console.log("题目生成范围不正确！允许范围：1~100"); 22 ?????????????23 ????????} 24 ?????????25 ????} 26 ????else{ 27 ?????????28 ????????console.log("题目数量不正确！允许范围：1~10000"); 29 ????????return; 30 ?????????31 ????} 32 ?????33 } 34 else if( (arg1 === "-e") && (arg3 === "-a") ){//检查题目 35 ?????36 ????arg2 = arg2 ? arg2 : "exercisefile.txt"; 37 ????arg4 = arg4 ? arg4 : "answerfile.txt"; 38 ?????39 ????judge(arg2,arg4); 40 ?????41 } 42 else{ 43 ?????44 ????console.log("参数错误！"); 45 ????console.log("用例："); 46 ????console.log("生成题目：node e.js -n 10 -r 10"); 47 ????console.log("检查题目：node e.js -e exercisefile.txt -a answerfile.txt"); 48 ?????49 } 50 ?51 function convert(str){//将任何数转成真分数（小数不换） 52 ?????53 ????//整数 2 = 2‘1/1 54 ????//真分数 3/8 55 ????//假分数 2‘2/3 56 ????//带分数 1‘1/1 57 ?????58 ????if( str.indexOf("/") >= 0 ){//真分数或带分数 59 ?????????60 ????????if( str.indexOf("‘") >= 0 ){//带分数 61 ?????????????62 ????????????first = str.split("‘")[0]; 63 ????????????second = str.split("‘")[1]; 64 ?????????????65 ????????????up = second.split("/")[0]; 66 ????????????down = second.split("/")[1]; 67 ?????????????68 ????????????if( ( up === down ) || ( down === "1" ) ){ 69 ????????????????return "ERROR"; 70 ????????????} 71 ?????????????72 ????????????str = ( (+first) * (+down) + (+up) ) + "/" + down; 73 ?????????????74 ????????} 75 ????????else{//真分数 76 ????????????; 77 ????????} 78 ?????????79 ????} 80 ????else{//整数 81 ?????????82 ????????str = str + "/1"; 83 ?????????84 ????} 85 ?????86 ????console.log(str); 87 } 88 ?89 ?90 function produce(n, range){ 91 ?????92 ????//console.log(n,range); 93 ?????94 ????//随机生成符号（1,2,3） -> 随机生成运算数种类 -> 随机生成运算数 -> 随机生成括号 95 ?????96 ????var symbol = Math.random(); 97 ????var symbolNum; 98 ?????99 ????if( symbol <= 1/3 ){//生成一个符号100 ????????symbolNum = 1;101 ????}102 ????else if( symbol <= 2/3 ){//生成两个符号103 ????????symbolNum = 2;104 ????}105 ????else{//生成三个符号106 ????????symbolNum = 3;107 ????}108 ????109 ????var symbolChoice = [];110 ????var tmp;111 ????for(var a = 0; a < symbolNum; a++){112 ????????113 ????????tmp = Math.random();114 ????????if( tmp <= 1/4 ){115 ????????????symbolChoice.push("+");116 ????????}117 ????????else if( tmp <= 2/4 ){118 ????????????symbolChoice.push("-");119 ????????}120 ????????else if( tmp <= 3/4 ){121 ????????????symbolChoice.push("*");122 ????????}123 ????????else{124 ????????????symbolChoice.push("/");125 ????????}126 ????????127 ????}128 ????129 ????console.log(symbolChoice);130 ????131 ????132 ????var numChoice = [];133 ????134 ????135 ????136 }137 138 139 function judge(file1,file2){140 ????141 ????console.log(file1,file2)142 ????143 ????var fs = require("fs");144 ????145 ????fs.readFile(file1, function (err1, data1) {// 异步读取练习题146 ????147 ????????if (err1) {148 ????????????return console.error(err1);149 ????????}150 ????????151 ????????var lines1 = data1.toString().split("\r\n");152 ????????153 ????????fs.readFile(file2, function (err2, data2) {// 异步读取答案154 ????155 ????????????if (err2) {156 ????????????????return console.error(err2);157 ????????????}158 ????????159 ????????????var lines2 = data2.toString().split("\r\n");160 ????????161 ????????????if(lines1.length !== lines2.length){162 ????????????????163 ????????????????console.log("题目数与答案数不匹配！题目数：" + lines1.length + "答案数" + lines2.length );164 ????????????????return;165 ????????????????166 ????????????}167 ????????????168 ????????????var correct = [];169 ????????????var wrong = [];170 ????171 ????????????var expression;172 ????????????var left,right;173 ????174 ????175 ????????????for( var a = 0; a < lines1.length; a++ ){//按行读取176 ????????177 ????????????????expression = lines1[a].split(". ")[1];178 ????????????????left = eval(expression);179 ????????180 ????????????????answer = lines2[a].split(". ")[1];181 ????????????????right = eval(answer);182 ????????183 ????????????????if( Math.abs(right - left) < 1e-10 || Math.abs(left - right) < 1e-10 ){//正确184 ????????????185 ????????????????????correct.push( (a + 1) + "" );186 ????????????187 ????????????????}188 ????????????????else{//错误189 ????????????190 ????????????????????wrong.push( (a + 1) + "" );191 ????????????192 ????????????????}193 ????????194 ????????195 ????????????}196 ????197 ????????????var result = "";198 ????????????result += "Correct: " + correct.length + " (" + ("" + correct ) + ")\n";199 ????????????result += "Wrong: " + wrong.length + " (" + ("" + wrong ) + ")\n";200 ????201 ????202 ????????????fs.writeFile(‘Grade.txt‘, result, ?function(err) {203 ????????????????if (err) {204 ????????????????????return console.error(err);205 ????????????????}206 ????????????????console.log("数据写入成功！");207 ????????????????console.log("--------我是分割线-------------");208 ????????????});209 ????????210 ????????});211 ????????212 ????});213 ????214 ????????215 ????216 }PSP2.1 | Personal Software Process Stages | 预估耗时（分钟） | 实际耗时（分钟） |
Planning | 计划 | 120 | 60 |
· Estimate | · 估计这个任务需要多少时间 | 15 | 15 |
Development | 开发 | 360 | 300 |
· Analysis | · 需求分析 (包括学习新技术) | 60 | 60 |
· Design Spec | · 生成设计文档 | 30 | 30 |
· Design Review | · 设计复审 (和同事审核设计文档) | 30 | 30 |
· Coding Standard | · 代码规范 (为目前的开发制定合适的规范) | 15 | 15 |
· Design | · 具体设计 | 60 | 60 |
· Coding | · 具体编码 | 120 | 100 |
· Code Review | · 代码复审 | 120 | 160 |
· Test | · 测试（自我测试，修改代码，提交修改） | 40 | 40 |
· Reporting | · 报告 | 90 | 90 |
· Test Report | · 测试报告 | 60 | 60 |
· Size Measurement | · 计算工作量 | 30 | 30 |
· Postmortem & Process Improvement Plan | · 事后总结, 并提出过程改进计划 | 30 | 30 |
合计 | 1180 | 1080 |
Arithmometer: A Node.js implementation
原文地址：https://www.cnblogs.com/m870100/p/9679902.html