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index.html
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<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>数学计算题生成器</title>
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" rel="stylesheet">
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.min.css" rel="stylesheet">
<style>
body {
font-family: Arial, sans-serif;
background-color: #f4f4f4;
margin: 20px;
padding: 20px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
h1 {
color: #333;
text-align: center;
margin-bottom: 20px;
}
button {
margin: 10px;
padding: 10px 15px;
font-size: 16px;
background-color: #007bff;
color: white;
border: none;
border-radius: 5px;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: #0056b3;
}
#questions,
#history {
margin: 20px 0;
padding: 10px;
background-color: #fff;
border-radius: 5px;
box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
display: flex;
flex-wrap: wrap;
}
.question {
width: 32%; /* 每列占32%的宽度 */
margin: 1%;
font-size: 18px;
line-height: 1.2; /* 减小上下间距 */
border: 1px solid #e0e0e0;
border-radius: 4px;
padding: 5px 10px; /* 减小padding */
text-align: center;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
#history h2 {
text-align: center;
}
@media print {
body {
margin: 0;
padding: 0;
}
.question {
width: 30%; /* 打印时每列占30% */
margin: 0 1% 1% 0;
page-break-inside: avoid; /* 避免在题目内部换页 */
}
h1 {
display: none; /* 打印时不显示标题 */
}
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.4.0/jspdf.umd.min.js"></script>
</head>
<body>
<h1>数学计算题生成器</h1>
<div class="form-group">
<label for="questionCount">生成题目数量:</label>
<input type="number" id="questionCount" class="form-control" value="100" min="1">
</div>
<div id="questions"></div>
<button id="generate"><i class="fas fa-plus"></i> 生成题目</button>
<button id="export"><i class="fas fa-file-download"></i> 导出为PDF文件</button>
<button id="print"><i class="fas fa-print"></i> 打印题目</button>
<div id="history">
<h2>生成历史</h2>
<div id="historyContent"></div>
</div>
<script>
const historyData = [];
function generateQuestions() {
const questionsDiv = document.getElementById("questions");
const questionCount = document.getElementById("questionCount").value;
questionsDiv.innerHTML = ""; // 清空之前的题目
const operations = ["+", "-", "×", "÷"]; // 题目运算符
const questions = [];
for (let i = 0; i < questionCount; i++) {
const num1 = Math.floor(Math.random() * 100); // 生成第一个数
const num2 = Math.floor(Math.random() * 100); // 生成第二个数
const operation = operations[Math.floor(Math.random() * operations.length)]; // 随机选择运算符
// 避免除数为零的情况
if (operation === "÷" && num2 === 0) {
num2 = 1; // 如果第二个数为0，设为1
}
const question = `${num1} ${operation} ${num2} = `; // 添加等号
questions.push(question);
questionsDiv.innerHTML += `<div class="question">${i + 1}. ${question}</div>`;
}
historyData.push(questions.join('\n')); // 将题目存入历史记录
updateHistory();
}
function updateHistory() {
const historyContent = document.getElementById("historyContent");
historyContent.innerHTML = "";
historyData.forEach((item, index) => {
historyContent.innerHTML += `<div>${index + 1}: <pre>${item}</pre></div>`;
});
}
function exportToPDF() {
const { jsPDF } = window.jspdf;
const pdf = new jsPDF();
const questionsDiv = document.getElementById("questions");
const questions = questionsDiv.getElementsByClassName("question");
let y = 10; // y坐标
let x = 10; // x坐标
const columnWidth = 60; // 每列的宽度
const maxColumns = 3; // 每页最大列数
for (let i = 0; i < questions.length; i++) {
const questionText = questions[i].innerText;
if (i % maxColumns === 0 && i > 0) {
y += 60; // 新的一行
x = 10; // 重置x坐标
}
if (i % maxColumns === 0 && i > 0 && i % (maxColumns * 10) === 0) {
pdf.addPage(); // 每10行添加新的一页
y = 10; // 重置y坐标
}
pdf.text(questionText, x, y);
x += columnWidth; // 移动到下一列
if (i === questions.length - 1) {
pdf.save('数学计算题.pdf'); // 保存PDF文件
}
}
}
function printQuestions() {
const questionsDiv = document.getElementById("questions");
const printWindow = window.open('', '', 'height=600,width=800');
printWindow.document.write('<html><head><title>打印题目</title>');
printWindow.document.write('<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.min.css">');
printWindow.document.write('</head><body >');
printWindow.document.write('<h1>数学计算题</h1>');
printWindow.document.write('<div style="display: flex; flex-wrap: wrap;">');
const questions = questionsDiv.getElementsByClassName("question");
for (let i = 0; i < questions.length; i++) {
printWindow.document.write(`<div class="question" style="width:30%; margin:1%; text-align: center;">${questions[i].innerHTML}</div>`);
}
printWindow.document.write('</div></body></html>');
printWindow.document.close();
printWindow.print();
}
document.getElementById("generate").addEventListener("click", generateQuestions);
document.getElementById("export").addEventListener("click", exportToPDF);
document.getElementById("print").addEventListener("click", printQuestions);
</script>
</body>
</html>