JS遊戲Crowns and Anchors：結果錯誤

我無法理解我在Ethan Brown的書「Learning JavaScript」幫助下開發的遊戲的結果。JS遊戲Crowns and Anchors：結果錯誤

下面是代碼：

//helper functions for randomizing 
function rand(x,y){ 
    return x + Math.floor((y-x+1)*Math.random()); 
} 

function getFace(){ return ['crown','heart','spade','club','diamond','anchor'][rand(0,5)]; } 

//the game 
function crownsAndAnchors(){ 
    console.log('Let\'s play Crowns and Anchors!'); 
    let rounds = 0; 
    let funds = 50; 
    while(funds > 1 && funds < 100){ 
    rounds ++; 
    console.log(`Round: ${rounds}`); 
    let totalBet = 7; 
    let bets = { crown: 0, heart: 0, spade:0, club:0, diamond:0, anchor:0 }; 
    if (totalBet == 7){ 
     totalBet = funds; 
     console.log('You pulled out 7p, your lucky number! Bet all on heart'); 
     bets.heart = totalBet; 
    }else{ 
     //distribute totalBet randomly 
    } 
    funds = funds - totalBet; 
    console.log('\tBets: ' + Object.keys(bets).map(face => `${face} ${bets[face]}p`).join(' || ') + ` (total: ${totalBet} pence)`); 
    const hand = []; 
    // roll the dice 
    console.log("_______________rolling the dice ____________") 
    for (let i = 0; i < 3; i++) { 
     hand.push(getFace()); 
    } 
    console.log(`\tHand: ${hand.join(', ')}`); 
    //check for winnings 
    let wins = 0; 
    for (let i = 0; i < hand.length; i++) { 
     let face = hand[i]; 
     if (bets[face] > 0) wins = wins + bets[face]; 
    } 
    funds = funds + wins; 
    console.log(`\tWinnings: ${wins}`); 
    } 
    console.log(`\nEnding Funds: ${funds}`); 
} 

crownsAndAnchors();

我已硬編碼可變totalBet爲7方便地監控最終結果。例如，如果三個死亡結果中有兩個是heart，那麼結束資金應該是150，對嗎？

然而，當我運行的代碼（節點v7.6.0），這是現在回到了我：

Let's play Crowns and Anchors! 

Round: 1 
You pulled out 7p, your lucky number! Bet all on heart 
     Bets: crown: 0p || heart: 50p || spade: 0p || club: 0p || diamond: 0p || anchor: 0p (total: 50 pence) 
_______________rolling the dice ____________ 
     Hand: heart, heart, club 
     Winnings: 100 

Ending funds: 100

我知道我莫名其妙地更新funds錯誤我只是想不通爲什麼。

非常感謝你提前！

來源

2017-03-05 Eric Alexander

該行 funds = funds - totalBet; 將資金設置爲0，然後稍後您將獲得兩個勝利50加入到它給你100.

如果你消除資金=資金 - totalBet的那條線，那麼你得到你所期望的150。

或者將該行移動到骰子滾動之後，並且只有在您沒有贏得任何東西時才執行它。

來源

2017-03-05 20:44:11

好眼，拉里！我繼續前進並刪除該行，並將其添加到_ //底部查詢winnings_' for loop'語句 'if（！wins）{funds = funds - totalBet; }' 它現在好像按照統計概率工作！謝謝 –

JS遊戲Crowns and Anchors：結果錯誤

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