【JS】三元表达式
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>d24c04429 欧永鸿</title>
</head>
<body>
<script>
var num = prompt("请输入一个0-99之间的数字");
var status = num >=10 ? num : "0" + num;
alert(status);
</script>
</body>
</html>
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