js html实现计算器功能
网络 2018-12-07 1378
本文实例为大家分享了html实现计算器功能的具体代码，供大家参考，具体内容如下
代码：
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 | <!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title></title> <script type="text/javascript"> var numresult; var str; function onclicknum(nums) { str = document.getElementById("nummessege"); str.value = str.value + nums; } function onclickclear() { str = document.getElementById("nummessege"); str.value = ""; } function onclickresult() { str = document.getElementById("nummessege"); numresult = eval(str.value); str.value = numresult; } </script> </head> <body bgcolor="affff"> <!--定义按键表格,每个按键对应一个事件触发--> <table border="1" align="center" bgColor="#bbff77" style="height: 350px; width: 270px"> <tr> <td colspan="4"> <input type="text" id="nummessege" style="height: 90px; width: 350px; font-size: 50px" /> </td> </tr> <tr> <td> <input type="button" value="1" id="1" onclick="onclicknum(1)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="2" id="2" onclick="onclicknum(2)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="3" id="3" onclick="onclicknum(3)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="+" id="add" onclick="onclicknum('+')" style="height: 70px; width: 90px; font-size: 35px"> </td> </tr> <tr> <td> <input type="button" value="4" id="4" onclick="onclicknum(4)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="5" id="5" onclick="onclicknum(5)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="6" id="6" onclick="onclicknum(6)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="-" id="sub" onclick="onclicknum('-')" style="height: 70px; width: 90px; font-size: 35px"> </td> </tr> <tr> <td> <input type="button" value="7" id="7" onclick="onclicknum(7)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="8" id="8" onclick="onclicknum(8)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="9" id="9" onclick="onclicknum(9)" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="*" id="mul" onclick="onclicknum('*')" style="height: 70px; width: 90px; font-size: 35px"> </td> </tr> <tr> <td colspan="2"> <input type="button" value="0" id="0" onclick="onclicknum(0)" style="height: 70px; width: 190px; font-size: 35px"> </td> <td> <input type="button" value="." id="point" onclick="onclicknum('.')" style="height: 70px; width: 90px; font-size: 35px"> </td> <td> <input type="button" value="/" id="division" onclick="onclicknum('/')" style="height: 70px; width: 90px; font-size: 35px"> </td> </tr> <tr> <td colspan="2"> <input type="button" value="Del" id="clear" onclick="onclickclear()" style="height: 70px; width: 190px; font-size: 35px" /> </td> <td colspan="2"> <input type="button" value="=" id="result" onclick="onclickresult()" style="height: 70px; width: 190px; font-size: 35px" /> </td> </tr> </table> </body> </html> |
效果图
以上就是本文的全部内容，希望对大家的学习有所帮助
