【JS】3.17课后练习

Osinghong1个月前 (03-17)成果展示121

练习一：

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>d24c04429 欧永鸿</title>
	</head>
	<body>
		<script>
			var time = prompt("请输入时间数字（0-24：");
			switch(time) {
				case "0":
				case "1":
				case "2":
				case "3":
				case "4":
				case "5":
				case "6":
				case "7":
					alert("深夜好");
					break;
				case "8":
				case "9":
				case "10":
				case "11":
				case "12":
					alert("上午好");
					break;
				case "13":
				case "14":
				case "15":
				case "16":
				case "17":
				case "18":
					alert("下午好");
					break;
				case "19":
				case "20":
				case "21":
				case "22":
				case "23":
				case "24":
					alert("晚上好");
					break;
				default:
					alert("请输入正确的时间数字");
			}
		</script>
	</body>
</html>

练习二：

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>d24c04429 欧永鸿</title>
	</head>
	<body>
		<script>
			var num1 = prompt("请输入第一个数字");
			var num2 = prompt("请输入第二个数字");
			var status = num1 > num2 ? num1 : num2;
			alert(status);
		</script>
	</body>
</html>

练习三：

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>d24c04429 欧永鸿</title>
	</head>
	<body>
		<script>
			var num = prompt("请输入一个数字");
			var status = num % 2 == 0 ? "偶数" : "奇数";
			alert(num + "是" + status);
		</script>
	</body>
</html>

练习四：

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>d24c04429 欧永鸿</title>
	</head>
	<body>
		<script>
			var score = prompt("请输入你的分数");
			switch (true) {
				case score >= 90:
					alert("A");
					break;
				case score >= 80:
					alert("B");
					break;
				case score >= 70:
					alert("C");
					break;
				case score >= 60:
					alert("D");
					break;
				default:
					alert("E");
			}
		</script>
	</body>
</html>

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