打印空心三角形
2019-06-25 本文已影响0人
Lamport
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>空心三角形-JavaScript</title>
</head>
<body>
<script type="text/javascript">
var h = prompt("请输入三角形的高", 5);
for(var q = 1; q < h; q++) {
document.write(" ");
}
document.write("＊" + "<br>");
for(var i = 1; i < h - 1; i++) {
for(var n = 1; n < h - i; n++) {
document.write(" ");
}
document.write("＊");
for(var j = 1; j <= 2 * i - 1; j++) {
document.write(" ");
}
document.write("＊");
document.write("<br>");
}
for(var m = 1; m <= 2 * h - 1; m++) {
document.write("＊");
}
</script>
</body>
</html>
