我的计算器代码如下 就是不能连续加减乘除 求具体代码 本人新手 求详细点
JiSuanQi
<!-- 移动层外部JS文件 -->
<br> var oper = ""<br> var isClickOper = false//是否点击了运算符<br> var num = 0;<br> var isClickPoint = false;//是否点击了小数点<br> //输入数字 <br> function addNum(n){<br> var nowNum = myform.num.value;<br> if(nowNum == "0"||isClickOper){//直接赋值<br> myform.num.value = n;<br> isClickOper = false;<br> }else if(myform.num.value.length<9){//限制文本框按键输入数字长度最多9个<br> //myform.num.value = myform.num.value + n;//连接赋值<br> myform.num.value += n //也可以这样写连接赋值<br> }<br> }<br> //添加运算符<br> function setOper(op){<br> oper = op;<br> num = myform.num.value*1;<br> isClickOper = true;<br> }</p> <pre><code> //得到结果 function getCount(){ if(oper != ""){ if(oper == "+"){ num = num + myform.num.value*1 }else if(oper == "-"){ num = num - myform.num.value*1 }else if(oper == "*"){ num = num * myform.num.value*1 }else if(oper == "/"){ if(myform.num.value == 0){ num ="除数不能为0"}else{ num = num / myform.num.value*1 } }else if(oper == "%"){ num = num % myform.num.value*1 } myform.num.value = num; } } //添加小数点 function addPoint(){ if(!isClickPoint){//判断是否点击过小数点 myform.num.value += "."; isClickPoint = true; } } //清楚 function cc(){ myform.num.value = "0"; isClickOper = false; isClickPoint = false; num = 0; oper="0"; } //删除 function del(){ var nowNum = myform.num.value; if(nowNum.length==1){ myform.num.value = "0"; }else{ myform.num.value = nowNum.substr(0,nowNum.length-1) } } </script> <!--鼠标进入默认按下放开样式--> <style> #ceng{width:440px;height:500px;background:#323850;} .jr{background-Image:url('jr.png')} .mr{background-Image:url('mr.png')} .ax{background-Image:url('ax.png')} .fk{background-Image:url('fk.png')} table{position:relative;top:30px;} </style> </head> <body bgcolor="green"> <center> <form id="myform"> <div onmousemove="mouseMove()" > <div onmousedown="mouseDown()" onmouseup="mouseUp()" id="ceng" style="top:80px;left:300px;position:absolute;cursor:"><font size="7">简易计算器</font> <table border="1" width="422px" height="360px" align="center"> <tr> <td colspan="4"> <input id="num" type="text" onfocus="blur()" value="0"/> </td> </tr> <tr> <td> <input id="bt1" type="button" value="1" onclick="addNum(1)"/> </td> <td> <input id="bt2" type="button" value="2" onclick="addNum(2)"/> </td> <td> <input id="bt3" type="button" value="3" onclick="addNum(3)"/> </td> <td> <input id="bt10" type="button" value="+" onclick="setOper('+')"/> </td> </tr> <tr> <td> <input id="bt4" type="button" value="4" onclick="addNum(4)"/> </td> <td> <input id="bt5" type="button" value="5" onclick="addNum(5)"/> </td> <td> <input id="bt6" type="button" value="6" onclick="addNum(6)"/> </td> <td> <input id="bt11" type="button" value="-" onclick="setOper('-')"/> </td> </tr> <tr> <td> <input id="bt7" type="button" value="7" onclick="addNum(7)"/> </td> <td> <input id="bt8" type="button" value="8" onclick="addNum(8)"/> </td> <td> <input id="bt9" type="button" value="9" onclick="addNum(9)"/> </td> <td> <input id="bt12" type="button" value="*" onclick="setOper('*')"/> </td> </tr> <tr> <td> <input id="bt0" type="button" value="0" onclick="addNum(0)"/> </td> <td> <input id="bt13" type="button" value="." onclick="addPoint()"/> </td> <td> <input id="bt14" type="button" value="%" onclick="setOper('%')"/> </td> <td> <input id="bt15" type="button" value="/" onclick="setOper('/')"/> </td> </tr> <tr> <td> <input id="bt16" type="button" value="C" onclick="cc()"/> </td> <td> <input id="bt17" type="button" value="←" onclick="del()"/> </td> <td colspan="2"> <input id="bt18" type="button" value="=" onclick="getCount()"/> </td> </tr> </table> </div> </div> </form> </center> </body> <script src="src/js/jsq.js"></script> </code></pre> <p></html></p>
var fl;
function getValue()
{
isPass =true;
num1 =document.getElementById("txtNum1").value;
num2 = document.getElementById("txtNum2").value;
result = document.getElementById("txtResult");
checkVal();
}
function checkVal()
{
if(num1=="" || num2=="")
{
alert("不能为空");
isPass = false;
}else
{
if(num1!=0)
{
if(!Number(num1))
{
isPass = false;
}
}
if(fl=="/")
{
if(num2 == 0)
{
alert("除数不能为0");
isPass = false;
}
}
if(fl!="/"){
if(num2!=0){
if(!Number(num2))
{
alert("请输入数字");
isPass = false;
}
}
}
}
}
//加法
function doAdd()
{
getValue();
if(isPass)
{
result.value =Number(num1)+Number(num2);
}
}
//减法
function doMinus()
{
getValue();
if(isPass)
{
result.value =Number(num1)-Number(num2);
}
}
//乘法
function doMultiply(){
getValue();
if(isPass)
{
result.value =Number(num1)*Number(num2);
}
}
//除法
function doDivide(){
getValue();
if(isPass)
{
result.value =Number(num1)/Number(num2);
}
}
function clearValue()
{
document.getElementById("txtNum1").value = "";
document.getElementById("txtNum2").value = "";
document.getElementById("txtResult").value = "";
}