1let totalRounds = 0;
2let finalBalance = 0;
3function simulateMartingale() {
4    const initialBet = parseFloat(
5        document.getElementById("initialBet").value
6    );
7    let balance = parseFloat(
8        document.getElementById("startingBalance").value
9    );
10    let bet = initialBet;
11    let round = 0;
12    let output = "模擬結果：\n";
13    let winCount = 0;
14    let loseCount = 0;
15
16    while (balance > 0) {
17        round++;
18        const win = Math.random() < 0.5; // 50% 機率贏
19        output += `第 ${round} 局：投注 ${bet} 元，`;
20
21        if (win) {
22            balance += bet; // 贏了增加本金
23            output += `<div class=green>贏了！當前資金：${balance.toFixed(
24                2
25            )} 元</div>`;
26            bet = initialBet; // 重置投注金額
27            winCount++;
28        } else {
29            balance -= bet; // 輸了扣掉投注金額
30            output += `<div class=red>輸了... 當前資金：${balance.toFixed(
31                2
32            )} 元</div>`;
33            bet *= 2; // 加倍投注金額
34            loseCount++;
35
36            if (balance < bet) {
37                output +=
38                    "<div>資金不足，無法再加倍！模擬結束。</div>";
39                break;
40            }
41        }
42
43        if (balance <= 0) {
44            output += "<div>破產！模擬結束。</div>";
45            break;
46        }
47    }
48
49    output += `<div>共進行 ${round} 局，贏了 ${winCount} 局，輸了 ${loseCount} 局。</div>`;
50    totalRounds++;
51    finalBalance += balance;
52    output += `<div>平均最後收入: ${(
53        finalBalance / totalRounds
54    ).toFixed(2)} 元</div>`;
55
56    document.getElementById("output").innerHTML = output;
57    // scroll to bottom
58    document.getElementById("output").scrollTop =
59        document.getElementById("output").scrollHeight;
60}
61
62const start = () => {
63    for (
64        let i = 0;
65        i < document.getElementById("times").value;
66        i++
67    ) {
68        simulateMartingale();
69    }
70};