我試圖獲取“你想要多少漢堡”的輸入，但是當我運行程序時，我沒有得到這個選項。我在主函數中缺少什么？當我運行程序時也沒有彈出任何錯誤。def main():      endProgram = 'no'      while endProgram == 'no':         totalFry = 0        totalBurger = 0        totalSoda = 0         endOrder = 'no'        while endOrder == 'no':          print ('Enter 1 for Yum Yum Burger')          print ('Enter 2 for Grease Yum Fries')          print ('Enter 3 for Soda Yum')          option = input('Enter now -> ')          if option == 1:            totalBurger = getBurger(totalBurger)          elif option == 2:             totalFry = getFries(totalFry)          elif option == 3:            totalSoda = getSoda(totalSoda)          endOrder = input ('would you like to end your order? Enter No if you want to order more items: ')        total = calcTotal(totalBurger, totalFry, totalSoda)        printRecipt(total)        endProgram= input ('do you want to end program? (enter no to process new order)')    def getBurger(totalBurger):      burgerCount = input ('enter number of burgers you want: ')      totalBurger = totalBurgers + burgerCount * .99      return totalBurgers    def getFry(totalFry):      fryCount = input ('Enter How Many Fries You want: ')      totalFry = totalFries + fryCount * .79      return totalFries    def getSoda(totalSoda):      sodaCount = input('enter number of sodas you would want: ')      totalSoda = totalSoda + sodaCount * 1.09      return totalSoda    def calcTotal(totalBurger, totalFry, totalSoda):      subTotal = totalBurger + totalFry + totalSoda      tax = subTotal * .06      total = subTotal + tax      return total    def printRecipt(total):      print ('your total is $', total)    main()