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@ -1,138 +0,0 @@
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document.getElementById("fileInput").addEventListener("change", handleFile, false);
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document.getElementById("randomSelectButton").addEventListener("click", randomSelect);
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document.getElementById("clearScoresButton").addEventListener("click", clearScores);
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let students = [];
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// 处理文件上传
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function handleFile(e) {
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const file = e.target.files[0];
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const reader = new FileReader();
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reader.onload = function (event) {
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const data = new Uint8Array(event.target.result);
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const workbook = XLSX.read(data, { type: "array" });
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const firstSheet = workbook.Sheets[workbook.SheetNames[0]];
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const rows = XLSX.utils.sheet_to_json(firstSheet, { header: 1 });
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// 将学生数据转换为对象数组
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students = rows.map(row => ({
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id: row[0],
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name: row[1],
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score: 0, // 初始积分为0
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}));
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students.shift(); // 删除第一行的标题
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// 加载已存储的学生积分
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loadSavedScores();
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// 移除按钮的 hidden 类以显示点名按钮
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document.getElementById("randomSelectButton").classList.remove("hidden");
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document.getElementById("clearScoresButton").classList.remove("hidden");
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};
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reader.readAsArrayBuffer(file);
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}
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// 加载本地存储的积分数据
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function loadSavedScores() {
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const savedData = localStorage.getItem("studentsData");
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if (savedData) {
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const savedStudents = JSON.parse(savedData);
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students.forEach(student => {
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const savedStudent = savedStudents.find(s => s.id === student.id);
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if (savedStudent) {
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student.score = savedStudent.score;
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}
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});
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}
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updateRanking();
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}
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// 保存积分数据到本地存储
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function saveScores() {
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localStorage.setItem("studentsData", JSON.stringify(students));
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}
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// 随机点名并计算积分
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function randomSelect() {
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if (students.length === 0) return;
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// 计算总积分，按比例降低被点到的概率
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const totalScore = students.reduce((acc, student) => acc + (1 / (student.score + 1)), 0);
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let randomValue = Math.random() * totalScore;
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let selectedStudent = null;
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for (let student of students) {
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randomValue -= 1 / (student.score + 1);
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if (randomValue <= 0) {
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selectedStudent = student;
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break;
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}
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}
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// 点到学生
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document.getElementById("studentInfo").innerHTML = `
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<p>点到学生：${selectedStudent.name} (学号: ${selectedStudent.id})</p>
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`;
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document.getElementById("studentInfo").classList.remove("hidden");
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// 积分逻辑：每点到一次且到达课堂，积分 +1
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selectedStudent.score += 1;
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// 模拟回答是否正确
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const isAnswerCorrect = Math.random() > 0.5; // 随机决定答案是否正确
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let answerScore = 0;
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// 答题逻辑
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if (isAnswerCorrect) {
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answerScore = Math.random() * 2 + 0.5; // 随机增加0.5到2.5分
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selectedStudent.score += answerScore; // 增加答对的分数
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} else {
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answerScore = -1; // 答错则扣1分
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selectedStudent.score += answerScore; // 扣分
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}
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// 显示反馈
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const answerFeedback = isAnswerCorrect ? `+${answerScore.toFixed(1)} (答对)` : `${answerScore} (答错)`;
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document.getElementById("feedback").innerHTML = `
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<p>${selectedStudent.name} 的积分变动：+1 (点到) ${answerFeedback}</p>
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`;
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document.getElementById("feedback").classList.remove("hidden");
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// 保存积分到本地存储
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saveScores();
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updateRanking();
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}
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// 更新积分排行榜
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function updateRanking() {
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students.sort((a, b) => b.score - a.score);
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let rankTableHTML = students.map(student => `
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<tr>
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<td>${student.id}</td>
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<td>${student.name}</td>
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<td>${student.score.toFixed(1)}</td>
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</tr>
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`).join("");
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document.getElementById("rankList").innerHTML = rankTableHTML;
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document.getElementById("rankTable").classList.remove("hidden");
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}
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// 清除积分
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function clearScores() {
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students.forEach(student => {
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student.score = 0; // 清除积分
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});
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saveScores(); // 保存清空后的数据
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updateRanking(); // 更新排行榜
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}
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// 页面加载时，加载学生数据
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window.onload = function() {
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loadSavedScores();
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};
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