第一种:简易计算器代码如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>简易计算器</title>
</head>
<style>
table {
width: 400px;
height: 600px;
}
#btn {
width: 100px;
height: 100px;
font-size: 40px;
}
#result{
font-size: 40px;
}
.color {
background-color: gold;
}
.color1 {
background-color: yellow;
}
</style>
<script type="text/javascript">
var sum=0;
var Boo=false;//判断是否按下计算符号
var ope;//存储计算符号的变量
//获取数字
function num(Num) {
var result=document.getElementById('result');
if (Boo) {
result.value=Num;
Boo=false;//若接受过运算符,文本框清零
}else{
if (result.value=='0') {
result.value=Num;
} else{
result.value+=Num;
}
}
}
//避免出现两个小数点
function dian () {
var result=document.getElementById('result');
if (result.value.indexOf('.')==-1) {
result.value+='.';
}
}
//清零,重新加载页面
function clean() {
location.replace(location)
}
//退格
function backspace() {
var result=document.getElementById('result');
result.value=result.value.substring(0,result.value.length-1);
if (result.value=='') {
result.value=0;
}
}
function calc(op){
var result=document.getElementById('result').value*1;
if (result=='') {
result=0;
}
Boo=true;
switch (ope){
case '+':
sum=sum+result;
break;
case '-':
sum=sum-result;
break;
case '*':
sum=sum*result;
break;
case '/':
sum=sum/result;
break;
case '=':
document.getElementById('result').value=sum;
break;
default:sum=parseFloat(result);
break;
}
document.getElementById('result').value=sum;
ope=op;
}
</script>
<body bgcolor="aqua">
<table border="1px" cellspacing="0" align="center">
<caption><b>浩浩牌计算器</b> </caption>
<tr>
<td colspan="4"><input type="text" id="result" value="" style="width: 410px;height: 100px;background-color: #7CFC00;" align-text="center" /></td>
</tr>
<tr>
<td><input type="button" id="btn" value="C" class="color" onclick="clean()"/></td>
<td><input type="button" id="btn" value="←" class="color" onclick='backspace()'/></td>
<td><input type="button" id="btn" value="/" class="color1" onclick="calc('/')"/></td>
<td><input type="button" id="btn" value="*" class="color1" onclick="calc('*')"/></td>
</tr>
<tr>
<td><input type="button" id="btn" value="9" onclick="num(9)"/></td>
<td><input type="button" id="btn" value="8" onclick="num(8)"/></td>
<td><input type="button" id="btn" value="7" onclick="num(7)" /></td>
<td><input type="button" id="btn" value="+" class="color1" onclick="calc('+')" /></td>
</tr>
<tr>
<td><input type="button" id="btn" value="6" onclick="num(6)"/></td>
<td><input type="button" id="btn" value="5" onclick="num(5)"/></td>
<td><input type="button" id="btn" value="4" onclick="num(4)"/></td>
<td><input type="button" id="btn" value="-" class="color1" onclick="calc('-')"/></td>
</tr>
<tr>
<td><input type="button" id="btn" value="3" onclick="num(3)"/></td>
<td><input type="button" id="btn" value="2" onclick="num(2)"/></td>
<td><input type="button" id="btn" value="1" onclick="num(1)"/></td>
<td rowspan="2"><input type="button" id="btn" value="=" onclick="calc('=')" style="width: 100px;height: 200px; background-color: red;" /></td>
</tr>
<tr>
<td><input type="button" id="btn" value="√" class="color" onclick="num(√)"/></td>
<td><input type="button" id="btn" value="0" onclick="num(0)"/></td>
<td><input type="button" id="btn" value="." class="color" onclick="dian()"/></td>
</tr>
</table>
</body>
</html>
运行结果:
第二种计算器:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>计算器</title>
<link rel="stylesheet" type="text/css" href="计算器.css"/>
</head>
<style>
#main{
border: 10px outset deepskyblue;
margin: 30px auto;
background: lawngreen;
box-shadow: 5px 5px #CCCCCC inset;
padding-top: 20px;
}/*设置最外层表格样式*/
th{
height: 40px;
border: 2px outset #CCCCCC;
}
#result{
width: 97%;
height: 100%;
box-shadow: 3px 3px aquamarine inset;
text-align: right;
font-size: 20px;
background: #00BFFF;
}
[type=button]{
width: 60px;
height: 40px;
box-shadow: 3px 3px #CCCCCC,3px 3px #CCCCCC inset;
background-image:linear-gradient(to top right,#000,#fff);/*设置按钮渐变色*/
color: #00FFFF;
font-weight: bold;
margin: 5px;
border-radius: 10px/6px;
}/*设置所有butto的样式*/
#table1,#table2,#table3{
margin-top: 20px;
border: 2px outset #CCCCCC;
}
[type=button]:hover{
background-image:linear-gradient(to top right,#fff,#000);
}
#time{
margin: 0;
padding: 0;
color:#00FFFF;
}
</style>
<script>
var sum=0;
var Boo=false;//判断是否按下计算符号
var ope;//存储计算符号的变量
//获取数字
function num(Num) {
var result=document.getElementById('result');
if (Boo) {
result.value=Num;
Boo=false;//若接受过运算符,文本框清零
}else{
if (result.value=='0') {
result.value=Num;
} else{
result.value+=Num;
}
}
}
//避免出现两个小数点
function dian () {
var result=document.getElementById('result');
if (result.value.indexOf('.')==-1) {
result.value+='.';
}
}
//清零,重新加载页面
function clean() {
location.replace(location)
}
//退格
function backspace() {
var result=document.getElementById('result');
result.value=result.value.substring(0,result.value.length-1);
if (result.value=='') {
result.value=0;
}
}
function calc(op){
var result=document.getElementById('result').value*1;
if (result=='') {
result=0;
}
Boo=true;
switch (ope){
case '+':
sum=sum+result;
break;
case '-':
sum=sum-result;
break;
case '*':
sum=sum*result;
break;
case '/':
sum=sum/result;
break;
case '取整':
sum=Math.floor(sum/result);
break;
case '%':
sum=sum%result;
break;
case 'x^y':
sum=Math.pow(sum,result);
break;
case '+/-':
sum=result*(-1);
break;
case '=':
document.getElementById('result').value=sum;
break;
default:sum=parseFloat(result);
break;
}
document.getElementById('result').value=sum;
ope=op;
}
function calc1(op){
var result=document.getElementById('result').value*1;
var π=Math.PI*2/360;//角度转换成弧度
var deg=360/(Math.PI*2);//弧度转换成角度
if (result=='') {
result=0;
}
Boo=true;
switch (op){
case 'sin':
sum=Math.round(Math.sin(result* π)*100000000000000)/100000000000000;
//sum=Math.sin(result* π);Math.round()解决浮点数运算问题
break;
//程序处理浮点数的时候,每一次运算都会取一次近似值,所以最终的结果,总是近似值,而不是我们通过代数得出的结果。
case 'cos':
sum=Math.round(Math.cos(result* π)*100000000000000)/100000000000000;
break;
case 'tan':
sum=Math.round(Math.tan(result* π)*100000000000000)/100000000000000;
break;
case 'asin':
sum=Math.round(Math.asin(result)*deg*100000000000000)/100000000000000+'°';
break;
case 'acos':
sum=Math.round(Math.acos(result)*deg*100000000000000)/100000000000000+'°';
break;
case 'atan':
sum=Math.round(Math.atan(result)*deg*100000000000000)/100000000000000+'°';
break;
case 'PI':
sum=Math.PI;
break;
case '1/x':
sum=1/parseFloat(result);
break;
case 'exp':
sum=Math.exp(result);
break;
case 'Inx':
sum=Math.log(result);
break;
case 'lgx':
sum=Math.log10(result);
break;
case 'n!':
for (var i=1;i<result;i++) {
sum=sum*i;
}
break;
default:sum=parseFloat(result);
break;
}
document.getElementById('result').value=sum;
}
//设置时间
window.onload=function(){
showTime();
}
function showTime(){
var today=new Date();
var y=today.getFullYear();
var M=today.getMonth()+1;
var d=today.getDate();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
m=checkTime(m);
s=checkTime(s);
var week=today.getDay();
var w=new Array('星期天','星期一','星期二','星期三','星期四','星期五','星期六');
for (var i=0;i<w.length;i++) {
document.getElementById('time').innerHTML=y+'年'+M+'月'+d+'日'+'</br>'+h+":"+m+":"+s+' '+w[week];
}
setTimeout('showTime()',500);
}
//数字小于10时,前面添加一个0
function checkTime(i){
if (i<10) {
i="0" + i;
}
return i
}
</script>
<script src="计算器.js" type="text/javascript" charset="utf-8"></script>
<body bgcolor="yellow">
<table border="0" cellspacing="0" cellpadding="" id='main' align="center">
<tr>
<th id='time'></th>
<th >
<input type="text" id="result" value="0" />
</th>
<th>
<input type="button" name="" id="" value="清零" onclick="clean()"/>
<input type="button" name="" id="" value="退格" onclick='backspace()'/>
</th>
</tr>
<tr>
<td>
<table id="table1">
<tr>
<td>
<input type="button" name="" id="" value="sin" onclick="calc1('sin')"/>
</td>
<td>
<input type="button" name="" id="" value="cos" onclick="calc1('cos')"/>
</td>
<td>
<input type="button" name="" id="" value="tan" onclick="calc1('tan')"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="asin" onclick="calc1('asin')"/>
</td>
<td>
<input type="button" name="" id="" value="acos" onclick="calc1('acos')"/>
</td>
<td>
<input type="button" name="" id="" value="atan" onclick="calc1('atan')"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="PI" onclick="calc1('PI')"/>
</td>
<td>
<input type="button" name="" id="" value="1/X" onclick="calc1('1/x')"/>
</td>
<td>
<input type="button" name="" id="" value="exp" onclick="calc1('exp')"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="Inx" onclick="calc1('Inx')"/>
</td>
<td>
<input type="button" name="" id="" value="lgx" onclick="calc1('lgx')"/>
</td>
<td>
<input type="button" name="" id="" value="n!" onclick="calc1('n!')"/>
</td>
</tr>
</table>
</td>
<td>
<table id="table2">
<tr>
<td>
<input type="button" name="" id="" value="7" onclick="num(7)"/>
</td>
<td>
<input type="button" name="" id="" value="8" onclick="num(8)"/>
</td>
<td>
<input type="button" name="" id="" value="9" onclick="num(9)"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="4" onclick="num(4)"/>
</td>
<td>
<input type="button" name="" id="" value="5" onclick="num(5)"/>
</td>
<td>
<input type="button" name="" id="" value="6" onclick="num(6)"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="1" onclick="num(1)"/>
</td>
<td>
<input type="button" name="" id="" value="2" onclick="num(2)"/>
</td>
<td>
<input type="button" name="" id="" value="3" onclick="num(3)"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="0" onclick="num(0)"/>
</td>
<td>
<input type="button" name="" id="" value="." onclick="dian()"/>
</td>
<td>
<input type="button" name="" id="" value="=" onclick="calc('=')"/>
</td>
</tr>
</table>
</td>
<td>
<table id="table3">
<tr>
<td>
<input type="button" name="" id="" value="+" onclick="calc('+')"/>
</td>
<td>
<input type="button" name="" id="" value="取整" onclick="calc('取整')"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="-" onclick="calc('-')"/>
</td>
<td>
<input type="button" name="" id="" value="取余" onclick="calc('%')"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="*" onclick="calc('*')"/>
</td>
<td>
<input type="button" name="" id="" value="x^y" onclick="calc('x^y')"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="" id="" value="/" onclick="calc('/')"/>
</td>
<td>
<input type="button" name="" id="" value="+/-" onclick="calc('+/-')"/>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
运行结果: