爲什麼在我的輸出中未定義類型？

Question

我在運行我的代碼後，在TYPE列下出現undefined。我看着我的功能，他們對我來說似乎很好。 TYPE列應該是Child，Junior或Adult。您可以在提示中輸入10，表示已售出的門票數量以及收費標準。

<script type="text/javascript">  
    var BR = "<br />"; 
    var JUNIOR_PRICE = 7.50; 
    var ADULT_PRICE = 11.50; 

     function main() 
     { 
      var ticketType; 
      var quantity = 0; 
      var charge = 0.00; 
      var ticketName; 
      var currentDate = ""; 
      var cAccum = 0; 
      var jAccum = 0; 
      var aAccum = 0; 
      var numTickets = 0; 
      var countNumber = 0; 
      var delta = 0.00; 
      var totRevenueC = 0.00; 
      var totRevenueJ = 0.00; 
      var totRevenueA = 0.00; 
      var totRevenue = 0.00; 
      var ticketsSold = 0.00; 

      document.write("SUMMERVILLE SEAWORLD" + BR); 
      currentDate = prompt("What is today's date? (ex: October 11, 2014)", ""); 
      document.write("Summary report for " + currentDate + BR); 

      ticketType = getTicketType(); 

      while (ticketType != 'Q') 
      { 
       quantity = getQuantity(); 
       charge = getCharge(); 

       if (ticketType == "C") 
       { 
        cAccum += quantity; 
        delta = 0; 
        totRevenueC = 0; 
       } 
       else if (ticketType == "J") 
       { 
        jAccum += quantity; 
        delta = charge - (quantity * JUNIOR_PRICE); 
        totRevenueJ = (jAccum * JUNIOR_PRICE) - delta; 
       } 
       else 
       { 
        aAccum += quantity; 
        delta = charge - (quantity * ADULT_PRICE); 
        totRevenueA = (aAccum * ADULT_PRICE) - delta; 
       } 

       countNumber ++; 
       ticketsSold += quantity; 
       totRevenue = totRevenueC + totRevenueJ + totRevenueA; 

       ticketType = getTicketType(); 

       displayOneOrder(countNumber, ticketName, quantity, charge, delta); 
      } 
      displayFinalReport(currentDate, countNumber, aAccum, totRevenueA, jAccum, totRevenueJ, cAccum, totRevenueC, totRevenue); 
     } 

     function getTicketType() 
     { 
      var tickType; 

      tickType = prompt("Enter ticket type: C, J, A or Q to quit", ""); 
      tickType = tickType.toUpperCase(); 
      while (tickType != "C" && tickType != "J" && tickType != "A" && tickType != "Q") 
      { 
       tickType = prompt("Invalid entry. Enter ticket: C, J, A or Q to quit", ""); 
       tickType = tickType.toUpperCase(); 
      } 
      return tickType; 
     } 

     function getQuantity() 
     { 
      var qty; 
      qty = prompt("How many tickets sold?", ""); 
      qty = parseFloat(qty); 
      //Validation loop for a negative amount 
      while (qty < 0.0) 
      { 
       qty = prompt ("Negative sale values are not allowed! Please enter the sale for that region:", ""); 
       qty = parseInt(qty); 
      } 
      return qty; 
     } 

     function getCharge() 
     { 
      var chrg; 
      chrg = prompt("What is the charge?", ""); 
      chrg = parseFloat(chrg); 
      //Validation loop for a negative amount 
      while (chrg < 0.0) 
      { 
       chrg = prompt ("Negative sale values are not allowed! Please enter the sale for that region:", ""); 
       chrg = parseFloat(chrg); 
      } 
      return chrg;     
     } 

     function findTicketName(tickType) 
     { 
      var tickName; 

      if (tickType == "C") 
      { 
       tickName = "Child"; 
      } 
      else if (tickType == "J") 
      { 
       tickName = "Junior"; 
      } 
      else 
      { 
       tickName = "Adult"; 
      } 
      return tickName;    
     } 

     function displayOneOrder(count, tickName, qty, chrg, delt) 
     { 
      document.writeln("<pre>"); 
      document.writeln("COUNTER #" + " " + "TYPE" + "  " + "QTY" + "  " + "ACTUAL CHG" + " " + "DELTA"); 
      document.writeln(count + "  " + tickName + "  " + qty + "  " + chrg.toFixed(2) + "  " + delt.toFixed(2) + BR); 
      document.writeln("</pre>"); 
     } 

     function displayFinalReport(currDate, count, aduAccum, totRevA, junAccum, totRevJ, chiAccum, totRevC, totRev) 
     { 
      document.write("SUMMERVILLE SEAWORLD" + BR + BR); 
      document.write("Summary report for " + currDate + BR + BR); 
      document.write("Number of records: " + count + BR + BR); 
      document.write("SALES TOTALS"); 

      document.writeln("<pre>"); 
      document.writeln("TICKET TYPE" + " " + "TOTAL TICKETS" + "  " + "TOTAL REVENUE"); 
      document.writeln("ADULT" + "    " + aduAccum + "    " + totRevA.toFixed(2) + BR); 
      document.writeln("JUNIOR" + "   " + junAccum + "    " + totRevJ.toFixed(2) + BR); 
      document.writeln("CHILD" + "    " + chiAccum + "    " + totRevC.toFixed(2) + BR + BR); 
      document.writeln("TOTAL REVENUE: " + totRev.toFixed(2)); 
      document.writeln("</pre>"); 
     } 
    </script>