用js編寫的簡單的計(jì)算器代碼程序
最近編寫的一個簡單的計(jì)算器代碼程序,先給大家展示一下
分享代碼如下
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <style type="text/css"> #box{width: 295px; margin: 0 auto; text-align: justify; border: 1px solid #ddd; padding: 15px;} .d_num{display: inline-block; margin: 10px; width: 33px; height: 30px; border: 1px solid #ddd; text-align: center; line-height: 30px; cursor: pointer;} .sum{margin: 0 10px 10px; line-height: 30px; font-size: 20px;} #sum{width: 205px; height: 30px; padding: 0 5px; margin-left: 5px; font-size: 20px;} #process{width: 255px; height: 30px; padding: 0 5px; margin-left: 5px; font-size: 20px;} </style> </head> <body> <div id="box"> <div class="sum"> <input type="text" name="process" id="process" value="0" /> </div> <div class="sum"> SUM:<input type="text" name="sum" id="sum" value="0" /> </div> <div> <span data-num="1" class="d_num">1</span> <span data-num="2" class="d_num">2</span> <span data-num="3" class="d_num">3</span> <span data-num="<-" class="d_num"><-</span> <span data-num="C" class="d_num">C</span> </div> <div> <span data-num="4" class="d_num">4</span> <span data-num="5" class="d_num">5</span> <span data-num="6" class="d_num">6</span> <span data-num="*" class="d_num">*</span> <span data-num="/" class="d_num">/</span> </div> <div> <span data-num="7" class="d_num">7</span> <span data-num="8" class="d_num">8</span> <span data-num="9" class="d_num">9</span> <span data-num="+" class="d_num">+</span> <span data-num="-" class="d_num">-</span> </div> <div> <span data-num="0" class="d_num">0</span> <span data-num="00" class="d_num">00</span> <span data-num="." class="d_num">.</span> <span data-num="%" class="d_num">%</span> <span data-num="=" class="d_num">=</span> </div> </div> <script type="text/javascript"> var $box = document.getElementById('box'); var $sum = document.getElementById('sum'); var $process = document.getElementById('process'); var sum = 0, process = '', num1 = '', num2 = '', temp = '', statu = false; $box.onclick = function(e){ var event = window.event || e; var ele = event.srcElement || event.target; var _className = ele.className; if(_className == 'd_num'){ var num = ele.getAttribute('data-num');//點(diǎn)擊的按鈕對應(yīng)的值 var NotNum = isNaN(num); if(!NotNum || num == '.'){ //點(diǎn)擊了數(shù)字 if(!statu){ //還沒點(diǎn)擊過符號 if(num1 == '0'){ num1 = ''; } num1 += num; process = num1; }else{ //已經(jīng)點(diǎn)擊過符號 if(num2 == '0'){ num2 = ''; } num2 += num; process = num1 + temp + num2; } $process.value = process; } else{ //點(diǎn)擊了符號 if(num1 == ''){//非法操作 return false; } if(num == 'C'){//歸零 num1 = ''; num2 = ''; process = ''; temp = ''; sum = ''; $process.value = '0'; $sum.value = '0'; statu = false; return false; } if(num == '<-'){//退檔 if(sum != ''){ return false; } if(num2 == ''){ ; num1 = num1.substring(0,num1.length-1); if(num1 == ''){ num1 = '0'; } process = num1; $process.value = process; }else{ num2 = num2.substring(0,num2.length-1); if(num2 == ''){ num2 = '0'; } process = num1 + temp + num2; $process.value = process; } return false; } if(num2 != ''){//a&b if(num == '='){//元操作到此結(jié)束 $process.value = process; }else{ $process.value = process + num; } switch(temp){//元操作繼續(xù) case '+' : sum = parseFloat(num1) + parseFloat(num2); $sum.value = sum; $process.value = process; num1 = sum + ''; num2 = ''; break; case '-' : sum = parseFloat(num1) - parseFloat(num2); $sum.value = sum; $process.value = process; num1 = sum + ''; num2 = ''; break; case '*' : sum = parseFloat(num1) * parseFloat(num2); $sum.value = sum; $process.value = process; num1 = sum + ''; num2 = ''; break; case '/' : sum = parseFloat(num1) / parseFloat(num2); $sum.value = sum; $process.value = process; num1 = sum + ''; num2 = ''; break; case '%' : sum = parseFloat(num1) % parseFloat(num2); $sum.value = sum; $process.value = process; num1 = sum + ''; num2 = ''; break; } }else{//a&? if(num == '='){ return false; } $process.value = process + num; process = ''; } if(num == '='){ sum = ''; statu = false; return false; } temp = num;//記錄操作符 statu = true;//已經(jīng)觸發(fā)操作狀態(tài) } } }; </script> </div> </body> </html>
現(xiàn)在只是個簡單的標(biāo)準(zhǔn)計(jì)算器,能進(jìn)行加減乘除連續(xù)運(yùn)算,以及求余運(yùn)算。如果發(fā)生被除數(shù)為零的錯誤,下面會給出提示,就像這樣:
這就是我設(shè)計(jì)的一個小程序,還有許多改進(jìn)的地方,比如界面的美化,會再接再厲。
以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助。
- 簡易js代碼實(shí)現(xiàn)計(jì)算器操作
- 用JS寫的簡單的計(jì)算器實(shí)現(xiàn)代碼
- javascript-簡單的計(jì)算器實(shí)現(xiàn)步驟分解(附圖)
- js網(wǎng)頁版計(jì)算器的簡單實(shí)現(xiàn)
- 基于JSP實(shí)現(xiàn)一個簡單計(jì)算器的方法
- js實(shí)現(xiàn)模擬計(jì)算器退格鍵刪除文字效果的方法
- javascript簡單計(jì)算器 可美化
- JSP實(shí)現(xiàn)計(jì)算器功能(網(wǎng)頁版)
- javascript實(shí)現(xiàn)簡易計(jì)算器的代碼
- javascript白色簡潔計(jì)算器
- JS實(shí)現(xiàn)的簡單四則運(yùn)算計(jì)算器功能示例
相關(guān)文章
基于JS+HTML實(shí)現(xiàn)彈窗提示是否確認(rèn)提交功能
這篇文章主要介紹了基于JS+HTML實(shí)現(xiàn)彈窗提示是否確認(rèn)提交功能,需要的朋友可以參考下2020-06-06JavaScript使用function定義對象并調(diào)用的方法
這篇文章主要介紹了JavaScript使用function定義對象并調(diào)用的方法,實(shí)例分析了javascript中function定義及使用對象與方法的相關(guān)技巧,需要的朋友可以參考下2015-03-03ElementUI的Dialog彈窗實(shí)現(xiàn)拖拽移動功能示例代碼
這篇文章主要介紹了ElementUI的Dialog彈窗實(shí)現(xiàn)拖拽移動功能,本文通過實(shí)例代碼給大家介紹的非常詳細(xì),對大家的學(xué)習(xí)或工作具有一定的參考借鑒價值,需要的朋友可以參考下2023-07-07js提示框替代系統(tǒng)alert,自動關(guān)閉alert對話框的實(shí)現(xiàn)方法
下面小編就為大家?guī)硪黄猨s提示框替代系統(tǒng)alert,自動關(guān)閉alert對話框的實(shí)現(xiàn)方法。小編覺得挺不錯的,現(xiàn)在就分享給大家,也給大家做個參考。一起跟隨小編過來看看吧2016-11-11

Javascript中3種實(shí)現(xiàn)繼承的方法和代碼實(shí)例

JS原生數(shù)據(jù)雙向綁定實(shí)現(xiàn)代碼