如果n的各位数字反向排列所得自然数与n相等,则n被称为“回文数”。 从键盘输一个数,请编写程序判断这个数字是不是回文数
时间: 2024-05-16 15:11:55 浏览: 9
好的,以下是用JavaScript实现一个简单的轮播图的代码:
HTML部分:
```
<div class="slideshow-container">
<div class="mySlides fade">
<img src="image1.jpg" style="width:100%">
<div class="text">Caption One</div>
</div>
<div class="mySlides fade">
<img src="image2.jpg" style="width:100%">
<div class="text">Caption Two</div>
</div>
<div class="mySlides fade">
<img src="image3.jpg" style="width:100%">
<div class="text">Caption Three</div>
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
```
CSS部分:
```
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
.mySlides {
display: none;
position: absolute;
top: 0;
left: 0;
right: 0;
}
.mySlides img {
vertical-align: middle;
width: 100%;
}
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
}
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
.prev:hover, .next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
.text {
color: white;
font-size: 25px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1s;
animation-name: fade;
animation-duration: 1s;
}
@-webkit-keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
@keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
```
JavaScript部分:
```
var slideIndex = 1;
showSlides(slideIndex);
function plusSlides(n) {
showSlides(slideIndex += n);
}
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
if (n > slides.length) {
slideIndex = 1
}
if (n < 1) {
slideIndex = slides.length
}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
slides[slideIndex - 1].style.display = "block";
dots[slideIndex - 1].className += " active";
}
```
使用这个代码,就可以实现一个简单的轮播图。希望对你有帮助!