a.使用浮动
float:right;
float:left;
b.清除浮动
clear:both;
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Float(浮动)</title>
</head>
<style>
.div1{
width: 200px;
height: 200px;
background-color: #FFA500;
float: left;
}
.div2{
width: 200px;
height: 200px;
background-color: red;
float: right;
}
.div4{
width: 200px;
height: 200px;
background-color: green;
float: right;
clear: both;
}
</style>
<body>
<div></div>
<div class="div1"></div>
<div class="div2"></div>
<div class="div3"></div>
<div class="div4"></div>
</body>
</html>
