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点击查看代码 
<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			let PI=3.14159
			var x=prompt('请输入半径')
			x=parseFloat(x)
			var y
			var z
			y=2*x*PI
			z=PI*x*x
			y=y.toFixed(2)
			z=z.toFixed(2)
			document.write('半径为：'+x+'<br>')
			document.write('周长为：'+y+'<br>')
			document.write('面积为：'+z+'<br>')
			//a='good'
			//b='59sd812d'
			//c='3.5.adf89'
			//a=parseFloat(a)
			//b=parseFloat(b)
			//c=parseFloat(c)
			//document.write(a+'<br>')
			//document.write(b+'<br>')
			//document.write(c+'<br>')
			//let a=10
			//const PI=3.14159
			//a='hello'
			//PI=5
			//document.write(a+'<br>')
			//document.write(PI+'<br>')
		</script>
	</body>
</html>
posted @ 2026-07-08 20:38  一直想被迫好的木鱼  阅读(2)  评论(0)    收藏  举报