javascript编写简易计算器
未知 网络 2017-05-10 1524
本文实例为大家分享了js简易计算器的具体代码，供大家参考，具体内容如下
代码如下
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>简易计算器</title> <style type="text/css"> *{ margin:0; padding: 0; } .content{ width: 300px; height: 400px; margin: 50px auto; background: #CBC6C6; border:1px solid #139EB7; box-shadow: -5px -5px 5px #565454; border-radius: 15px; } #toptext{ width: 280px; height: 50px; margin: 10px auto; margin-left: 9px; line-height: 50px; border-radius: 15px; text-align: right; font-size: 24px; border: 1px #F0D711 solid; } .btns{ width: 280px; height: 300px; margin: 10px auto; } .btns input{ width: 50px; margin: 10px; height: 60px; float: left; font-size: 24px; line-height: 60px; border-radius: 10px; transform-origin: left top; background: linear-gradient(to right,#0df60d,red); } .btns input:hover{ background: linear-gradient(to left,#0df60d,red); transform: rotate(15deg); } </style> </head> <body> <div class="content"> <input type="text" id="toptext"> <div class="btns"> <input type="button" value="1" class="num"> <input type="button" value="2" class="num"> <input type="button" value="3" class="num"> <input type="button" value="+" class="jisuan"> <input type="button" value="4" class="num"> <input type="button" value="5" class="num"> <input type="button" value="6" class="num"> <input type="button" value="-" class="jisuan"> <input type="button" value="7" class="num"> <input type="button" value="8" class="num"> <input type="button" value="9" class="num"> <input type="button" value="*" class="jisuan"> <input type="button" value="0" class="num"> <input type="button" value="C" id="clear"> <input type="button" value="=" id="equals"> <input type="button" value="/" class="jisuan"> </div> </div> <script type="text/javascript"> var text = document.getElementsByTagName('input')[0]; var clear = document.getElementById('clear'); var equals = document.getElementById('equals'); var js = document.getElementsByClassName('jisuan'); var num = document.getElementsByClassName('num'); text.value = 0; var tex = ""; var fuhao = ""; var firstNum = ""; var secondNum = ""; for(var i=0 ; i<num.length; i++){ num[i].onclick = function (){ if(fuhao){ text.value += this.value; secondNum = this.value; }else{ tex = tex+this.value; firstNum = tex; text.value = tex; } }; } for(var j=0; j<js.length; j++){ js[j].onclick = function(){ fuhao = this.value; text.value += this.value; }; } equals.onclick=function(){ switch (fuhao) { case '+': var res = firstNum*1 + secondNum*1; break; case '-': var res = firstNum - secondNum; break; case '*': var res = firstNum * secondNum; break; case '/': var res = firstNum / secondNum; break; default: break; } text.value = res; tex = ""; fuhao = ""; firstNum = ""; secondNum = ""; } clear.onclick = function(){ text.value = ""; } </script> </body> </html> |
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