Heim > Artikel > Web-Frontend > Einfaches Taschenrechner-Codeprogramm, geschrieben mit js_javascript-Kenntnissen
Ich zeige Ihnen ein einfaches Taschenrechner-Codeprogramm, das ich kürzlich geschrieben habe
Teilen Sie den Code wie folgt
<!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');//点击的按钮对应的值 var NotNum = isNaN(num); if(!NotNum || num == '.'){ //点击了数字 if(!statu){ //还没点击过符号 if(num1 == '0'){ num1 = ''; } num1 += num; process = num1; }else{ //已经点击过符号 if(num2 == '0'){ num2 = ''; } num2 += num; process = num1 + temp + num2; } $process.value = process; } else{ //点击了符号 if(num1 == ''){//非法操作 return false; } if(num == 'C'){//归零 num1 = ''; num2 = ''; process = ''; temp = ''; sum = ''; $process.value = '0'; $sum.value = '0'; statu = false; return false; } if(num == '<-'){//退档 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 == '='){//元操作到此结束 $process.value = process; }else{ $process.value = process + num; } switch(temp){//元操作继续 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;//记录操作符 statu = true;//已经触发操作状态 } } }; </script> </div> </body> </html>
Jetzt ist es nur noch ein einfacher Standardrechner, der kontinuierliche Additions-, Subtraktions-, Multiplikations- und Divisionsoperationen sowie Restoperationen durchführen kann. Wenn ein Null-Dividenden-Fehler auftritt, wird unten eine Eingabeaufforderung wie diese angezeigt:
Dies ist ein kleines Programm, das ich entworfen habe. Es gibt noch viele Verbesserungen, wie zum Beispiel die Verschönerung der Benutzeroberfläche, und ich werde weiterhin hart arbeiten.
Das Obige ist der gesamte Inhalt dieses Artikels. Ich hoffe, er wird für das Studium aller hilfreich sein.