Flash 动作脚本:moneycounter 代码运行不正确

Flash actionscript: moneycounter code not behaving correctly

我正在尝试在 Adob​​e Flash (Animate) 动画中设置虚拟巴士售票机。

前提是您必须在插槽中输入准确的车费,因为司机不携带零钱。确切票价为 2 美元。该机器接受 5 美分、10 美分、25 美分、1 美元、5 美元、10 美元和 20 美元的面额。如果输入的金额超过 2 美元,则会弹出一条消息,显示 "Exact fare only please. Drivers cannot provide change." 因此在这种情况下,只有 5 美分、10 美分、25 美分和 1 美元的面额有效,但必须输入它们以恰好加起来为 2 美元.

下面的代码对于 25 美分和 1 美元面额的单独和组合都可以正常工作,但是当 5 美分和 10 美分单独使用或与 25 美分和 1 美元一起使用时,它会出现错误。例如,如果您尝试仅使用 10 美分来达到 2 美元,则总额将达到 1.90 美元,但在您输入最后 10 美分时不会支付车费。而是触发弹出 "Exact fare only please" 消息。如果您随后添加 5 分硬币,总额将达到 1.95 美元,但当您输入最后一个 5 分硬币时,仍不会支付车费。而是再次触发弹出 "Exact fare only please." 消息。

输入 $1 然后再输入 $1 效果很好。输入 8 个季度与输入 $1 和 4 个季度一样有效。无法弄清楚问题是什么。将不胜感激任何帮助。 谢谢!

代码如下:

var Cash = 00.00
var payola = Money.text = "02.00";
Money.text = "$" + Cash.toFixed(2);
popup.visible = false;


nickel_btn.addEventListener(MouseEvent.CLICK, add5cents);

function add5cents(event:MouseEvent):void
{
    nickelcoin_mc.gotoAndPlay ("nickel_pay"); 
    Cash+=00.05;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        nickelcoin_mc.gotoAndPlay ("nickel_nopay");
        Cash-=00.05;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}

dime_btn.addEventListener(MouseEvent.CLICK, add10cents);

function add10cents(event:MouseEvent):void
{
    dimecoin_mc.gotoAndPlay ("dime_pay"); 
    Cash+=00.10;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        dimecoin_mc.gotoAndPlay ("dime_nopay");
        Cash-=00.10;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}

quarter_btn.addEventListener(MouseEvent.CLICK, add25cents);

function add25cents(event:MouseEvent):void
{
    quartercoin_mc.gotoAndPlay ("quarter_pay"); 
    Cash+=00.25;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        quartercoin_mc.gotoAndPlay ("quarter_nopay");
        Cash-=00.25;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}

one_btn.addEventListener(MouseEvent.CLICK, add);

function add(event:MouseEvent):void
{
    onebill_mc.gotoAndPlay ("one_pay"); 
    Cash+=01.00;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        onebill_mc.gotoAndPlay ("one_nopay");
        Cash-=01.00;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}

five_btn.addEventListener(MouseEvent.CLICK, add);

function add(event:MouseEvent):void
{
    fivebill_mc.gotoAndPlay ("five_pay"); 
    Cash+=05.00;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        fivebill_mc.gotoAndPlay ("five_nopay");
        Cash-=05.00;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}

ten_btn.addEventListener(MouseEvent.CLICK, add);

function add(event:MouseEvent):void
{
    tenbill_mc.gotoAndPlay ("ten_pay"); 
    Cash+=10.00;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        tenbill_mc.gotoAndPlay ("ten_nopay"); 
        Cash-=10.00;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}

twenty_btn.addEventListener(MouseEvent.CLICK, add);

function add(event:MouseEvent):void
{
    twentybill_mc.gotoAndPlay ("twenty_pay"); 
    Cash+=20.00;
    Money.text = "$" + Cash.toFixed(2);
    if(Cash == payola){
      setTimeout(delay, 500);
      function delay(){
        gotoAndStop(46);
        }
    }
    if(Cash > payola){
        twentybill_mc.gotoAndPlay ("twenty_nopay");
        Cash-=20.00;
        Money.text = "$" + Cash.toFixed(2);
        popup.visible = true;
    }
    else {
        popup.visible = false;
    }
}


stop();

这可能是浮点数引起的问题。尝试将其放入您的代码中并检查控制台输出:

// Expect result to be 0.1
trace(0.3-0.2);

0.09999999999999998

// Adding lots of 5 cent coins. Expect result to be 0.5
trace(0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05);

0.49999999999999994

您的 == 比较有时会失败,因为将浮点数相加会产生意外值。这个答案很好地解释了问题:

对于您的情况,尝试将 Cash 变量更改为 int,并存储美分而不是美元:

var Cash:int = 0;
var payola:int = 200; // 2 dollars

// Add 5 cents
Cash += 5;

// Adding 1 dollar
Cash += 100;

// Printing out the amount in dollars and cents
Money.text = "$" + (Cash / 100).toFixed(2);

// Our exact check is safe now that we avoid floats.
if(Cash == payola) { ... }