Untitled

<!DOCTYPE html>
<html>
<body>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.11/lodash.min.js"></script>
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>

<p>抽取機率請參考：<a href="https://f7.163.com/news/update/20181219/27047_791254.html" target="_blank">這裡</a><br></p>
<table style="width:100%">
	<tr>
		<td>
	可以抽幾次：<input maxlength="5" id="lottery" size="5" type="text" value="100" />
		</td><td>
	模擬次數：<input maxlength="4" id="times" size="4" type="text" value="50" /> <button name="start" onclick="myFunction()">開始模擬</button>
		</td>
	</tr>
	<tr>
		<td>
			<div>
				詳細結果：</p><textarea id="DetailResult" cols="50" rows="40"></textarea>
			</div>
		</td>
		<td>
			<div>
				重點結果：</p><textarea id="SimpleResult" cols="50" rows="40"></textarea>
			</div>
		</td>
	</tr>
</table>

<script>
if (!String.format) {
    String.format = function (src) {
        if (arguments.length == 0) return null;
        var args = Array.prototype.slice.call(arguments, 1);
        return src.replace(/\{(\d+)\}/g, function (m, i) {
            return args[i];
        });
    };
}

function validate() {
	var x;

	x = $.trim($("#lottery").val());
	if (! _.isInteger(x)) {
		x = _.toInteger(x);
	}
	if (x == 0) {
		x = 100;
	}
	if (x < 0) {
		x = Math.abs(x);
	}
	$("#lottery").val(_.toInteger(x));

	x = $.trim($("#times").val());
	if (! _.isInteger(x)) {
		x = _.toInteger(x);
	}
	if (x == 0) {
		x = 50;
	}
	if (x < 0) {
		x = Math.abs(x);
	}
	$("#times").val(_.toInteger(x));
}

function myFunction() {
/*	一般 S
	const s_fragment_min = 0;
	const s_fragment_max = 675;

	const s_fragment_1_min = 0;
	const s_fragment_1_max = s_fragment_max / 3;

	const s_fragment_2_min = s_fragment_1_max;
	const s_fragment_2_max = s_fragment_max * 2 / 3;

	const s_fragment_3_min = s_fragment_2_max;
	const s_fragment_3_max = s_fragment_max;

	const s_whole_min = s_fragment_max + 0;
	const s_whole_max = s_fragment_max + 25;
*/
// /*
// */ /*	特殊隙間 S
	const s_fragment_min = 0;
	const s_fragment_max = 400;

	const s_fragment_1_min = 0;
	const s_fragment_1_max = s_fragment_max / 3;

	const s_fragment_2_min = s_fragment_1_max;
	const s_fragment_2_max = s_fragment_max * 2.0 / 3;

	const s_fragment_3_min = s_fragment_2_max;
	const s_fragment_3_max = s_fragment_max;

	const s_whole_min = s_fragment_max + 0;
	const s_whole_max = s_fragment_max + 15;
// */

	validate();
	$("#DetailResult").val("");
	$("#SimpleResult").val("");

	let guessResutl = 0;
	let detailResult = "";
	let simpleResult = "";
	let guess_count = _.toInteger($("#lottery").val());
	let simulation_count = _.toInteger($("#times").val());
	for(let i=1; i<=simulation_count; i++) {
		let got_s = false;
		let s1 = 0;
		let s2 = 0;
		let s3 = 0;
		for(let j=1; j<=guess_count; j++) {
			let guess = _.random(0, 10000, true);
			if (_.inRange(guess, s_fragment_min, s_fragment_max)) {
				let k = 0;
				if (_.inRange(guess, s_fragment_1_min, s_fragment_1_max)) {
					k = 1;
					s1 ++;
				}
				else if (_.inRange(guess, s_fragment_2_min, s_fragment_2_max)) {
					k = 2;
					s2 ++;
				}
				else if (_.inRange(guess, s_fragment_3_min, s_fragment_3_max)) {
					k = 3;
					s3 ++;
				}
				detailResult += String.format("模擬第 {0}回，抽第 {1}次：抽到 S 碎片 {2}\n", i, j, k);
				if (s1 * s2 * s3) {
					detailResult += String.format("模擬第 {0}回：湊齊碎片拼成整隻 S\n", i);
					simpleResult += String.format("模擬第 {0}回，抽第 {1}次：湊齊碎片拼成整隻 S\n", i, j);
					guessResutl++;
					got_s = true;
				}
			}
			else if (_.inRange(guess, s_whole_min, s_whole_max)) {
				detailResult += String.format("模擬第 {0}回，抽第 {1}次：抽到整隻 S\n", i, j);
				simpleResult += String.format("模擬第 {0}回，抽第 {1}次：抽到整隻 S\n", i, j);
				guessResutl++;
				got_s = true;
			}

			if (!got_s && j == 180) {
				detailResult += String.format("模擬第 {0}回，抽第 {1}次：保底得到整隻 S\n", i, j);
				simpleResult += String.format("模擬第 {0}回，抽第 {1}次：保底得到整隻 S\n", i, j);
				guessResutl++;
				got_s = true;
			}

			$("#DetailResult").val(detailResult);
			$("#SimpleResult").val(simpleResult);
			if (got_s) {
				break;
			}
		}
		detailResult += "\n";
		$("#DetailResult").val(detailResult);
	}

	simpleResult += "\n";
	if (guessResutl > 0) {
		simpleResult += String.format("統計結果：如果您可以抽 {0}次，那麼得到 S 的機率為 {1}%\n", guess_count, guessResutl * 100.0 / simulation_count);
	}
	else {
		simpleResult += "統計結果：都沒有抽到\n";
	}

	$("#SimpleResult").val(simpleResult);
}
</script>

</body>
</html>