PROMULGATOR

    hcjsanrajpcmp

    浙江省杭州市
    Html
    Css
    Js
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<div id="a">
    <div id="b">
        <input type="text" name="" id="answer" readonly="readonly"><br>
        <input type="text" name="" id="answer2" readonly="readonly">
    </div>
    <div id="c">
        <input type="button" name="" id="fs1" value="C" onclick="clean()">
        <input type="button" name="" id="fs2" value="<" onclick="del()">
        <input type="button" name="" id="fs3" value="+" onclick="jia()">
        <input type="button" name="" id="fs4" value="-" onclick="jian()">
    </div>
    <div id="d">
        <input type="button" value="7" id="bs1" onclick="press(7)">
        <input type="button" value="8" id="bs2" onclick="press(8)">
        <input type="button" value="9" id="bs3" onclick="press(9)">
        <input type="button" name="" id="fs5" value="x" onclick="cheng()">
    </div>
    <div id="e">
        <input type="button" name="" id="bs4" value="4" onclick="press(4)">
        <input type="button" name="" id="bs5" value="5" onclick="press(5)">
        <input type="button" name="" id="bs6" value="6" onclick="press(6)">
        <input type="button" name="" id="fs6" value="÷" onclick="chu()">
    </div>
    <div id="f">
        <input type="button" name="" id="bs7" value="1" onclick="press(1)">
        <input type="button" name="" id="bs8" value="2" onclick="press(2)">
        <input type="button" name="" id="bs9" value="3" onclick="press(3)">
        <input type="button" name="" id="fs7" value="%" onclick="pressbf()">
    </div>
    <div id="g">
        <input type="button" name="" id="fs8" value="+/-" onclick="jj()">
        <input type="button" name="" id="bs10" value="0" onclick="presszero()">
        <input type="button" name="" id="fs9" value="." onclick="pressdian()">
        <input type="button" name="" id="fs10" value="＝" onclick="dy()">
    </div>
</div>
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body {
    margin:0;
    padding:0;
}
#a {
    width:260px;
    background-color:#fff;
    margin:20px auto;
    text-align:center;
    border:aquamarine 1px solid;
    border-radius:90px;
}
#b #answer,#answer2 {
    margin-top:20px;
    font-size:14px;
    background:transparent;
    height:30px;
    width:190px;
    border:#fff solid 1px;
    outline:none;
}
#c input {
    padding:10px;
    margin:3px;
    width:40px;
    height:40px;
    outline:none;
}
#d input {
    padding:10px;
    margin:3px;
    width:40px;
    height:40px;
    outline:none;
}
#e input {
    padding:10px;
    margin:3px;
    width:40px;
    height:40px;
    outline:none;
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// str 存储的为运算表达式 answer显示的为运算式或者点击等号后的最终结果 answer2为实时运算结果
function dy() {
    if (str.substr(str.length - 1, 1) == "+" || str.substr(str.length - 1, 1) == "*" || str.substr(str.length - 1, 1) == "-" || str.substr(str.length - 1, 1) == "/") {
        str = str.substring(0, str.length - 1);
        answer2.value = Number(eval(str));
        str = answer2.value;
        answer.value = str;
        answer2.value = "";
    } else {
        str = answer2.value;
        answer.value = str;
        answer2.value = "";
    }
    // 函数为点击等号 第一行显示运算结果第二行清空
}
function clean() {
    // 点击c清空存储用字符串以及第一第二行显示内容
    str = "";
    answer.value = str;
    answer2.value = str;
}
function jj() {
    if (answer2.value != "") {
        if (answer2.value > 0)
            answer2.value = "-" + eval(str);
        else {
            str = answer2.value;
            str = str.substr(1, str.length - 1);
            answer2.value = str;
        }
    }
}
var str = "";
// 用于存放要计算的表达式
function chu() {
    if (str === "") {
        answer2.value = "";
    } else {
        // 使用截取表达式最后一位如果为运算符那么再次点击运算符时用新的运算符将其替换
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↑上面代码改变，会自动显示代码结果 jQuery调用版本：1.11.3
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JS计算器（原创）

更新时间：2020-03-17 00:24:56

2
      程序员灬顾琪琪0
      2020/9/17 15:11:00
      我家的猫咪叫英俊0
      2020/7/3 15:51:29
      任何数*0=任何数 吗？ 回复