Arithmometer: A Node.js implementation

node e.js -n 10 -r 10

node e.js -e exercisefile.txt -a answerfile.txt

  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 }