【JS】加减乘除函数

Osinghong3周前 (04-07)成果展示57

个人思路，仅供参考

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>d24c04429</title>
		<meta name="viewport"
			content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
		
	</head>
	<body>
		<script>
			function getSum(a, b) {
				var sum = parseInt(a)+parseInt(b);
				return sum;
			}
			function getSub(a, b) {
				var sub = parseInt(a)-parseInt(b);
				return sub;
			}
			function getMul(a, b) {
				var mul = parseInt(a)*parseInt(b);
				return mul;
			}
			function getDiv(a, b) {
				var div = parseInt(a)/parseInt(b);
				return div;
			}
			var a = prompt("请输入第一个数字：");
			var tip = prompt("+加法 -减法 *乘法 /除法  请输入符号：");
			var b = prompt("请输入第二个数字：");
			if (tip == "+") {
				alert("结果是：" + getSum(a, b));
			} else if (tip == "-") {
				alert("结果是：" + getSub(a, b));
			} else if (tip == "*") {
				alert("结果是：" + getMul(a, b));
			} else if (tip == "/") {
				alert("结果是：" + getDiv(a, b));
			} else {
				alert("输入错误！");
			}
		</script>
	</body>
</html>

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