收藏
PHPz批改状态：合格
老师批语：
js简易计算器的代码如下：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title></head><body><div><input type="text" size="5" id="num1" value="" /><select id="ysf"><option value="+">+</option><option value="-">-</option><option value="*">*</option><option value="/">/</option><option value="%">%</option></select><input type="text" size="5" id="num2" value=""/><input type="button" value="计算" id="btn" /></div><p id="res"></p><script>document.getElementById('btn').onclick=function(){var num1 = document.getElementById('num1').value;var num2 = document.getElementById('num2').value;var ysf = document.getElementById('ysf').value;document.getElementById('res').innerHTML=num1+"---"+num2+"---"+ysf;var res = document.getElementById('res')// res.innerHTML = num1+'x'+num2+'='+(num1 * num2)switch(ysf){case '+':res.innerHTML = num1+'+'+num2+'='+(parseInt(num1) + parseInt(num2));break;case '-':res.innerHTML = num1+'-'+num2+'='+(parseInt(num1) - parseInt(num2));break;case '*':res.innerHTML = num1+'*'+num2+'='+(parseInt(num1) * parseInt(num2));break;case '/':res.innerHTML = num1+'/'+num2+'='+(parseInt(num1) / parseInt(num2));break;case '%':res.innerHTML = num1+'%'+num2+'='+(parseInt(num1) % parseInt(num2));break;}}</script></body></html>
js代码如下：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title></head><body><script>//九九乘法表：第一种方法document.write('<table border="1" width="800" align="center">')for (var i = 1; i <= 9; i++) {document.write('<tr>')for (var td = 1; td <= i; td++) {document.write('<td>'+ td + '×' + i + '=' + (td * i) + '</td>')}document.write('</tr>')}document.write('</table>')document.write('<br/>')//九九乘法表：第二种方法（相反）document.write('<table border="1" width="800" align="center">')for (var i = 9; i > 0; i--) {document.write('<tr>')for (var td = 1; td <= i; td++) {document.write('<td>'+ td + '×' + i + '=' + (td * i) + '</td>')}document.write('</tr>')}document.write('</table>')</script></body></html>
学习一段时间了,感觉js基础的熟练度不够，有的忘了。。。看来需要多练多写多记的js，记录和积累~
Copyright 2014-2025 https://www.php.cn/ All Rights Reserved | php.cn | 湘ICP备2023035733号
