最近編寫的一個簡單的計算器代碼程序，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');//點擊的按鈕對應的值 var NotNum = isNaN(num); if(!NotNum || num == '.'){ //點擊了數字 if(!statu){ //還沒點擊過符號 if(num1 == '0'){ num1 = ''; } num1 += num; process = num1; }else{ //已經點擊過符號 if(num2 == '0'){ num2 = ''; } num2 += num; process = num1 + temp + num2; } $process.value = process; } else{ //點擊了符號 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 == '='){//元操作到此結束 $process.value = process; }else{ $process.value = process + num; } switch(temp){//元操作繼續 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;//已經觸發操作狀態 } } }; </script></div> </body> </html> 現在只是個簡單的標準計算器，能進行加減乘除連續運算，以及求余運算。如果發生被除數為零的錯誤，下面會給出提示，就像這樣：
這就是我設計的一個小程序，還有許多改進的地方，比如界面的美化，會再接再厲。
以上就是本文的全部內容，希望對大家的學習有所幫助。
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