对于用python编程相对比较陌生，感谢您对我在另一个python项目上的上一个问题提供的所有快速帮助。无论如何，我用python为一个项目编写了一个新程序，该程序生成了一个餐饮场所的账单。这是我下面的代码，一切运行良好，我得到了项目所需的预期结果，我所经历的两个问题是，1。我需要沙漠的成本，而不是打印3.0美元，而是3.00美元，基本上，我如何打印美元符号，圆形e.x 3.0--3.00，或45.0--45.00…并在价格前加美元符号。如果有人问过这样的问题，我很抱歉。。在import math

# constants

Cost_Per_Desert = 3.00

Tax_Rate = .075

Gratuity_Tips = .15

Adult_Meal_Cost = 12.75

Child_Meal_Cost = .60*12.75

Room_Fee = 450.00

Less_Deposit = 250.00

def main():

# Input Section

Name = input("\n\n Customer:\t\t\t ")

Number_Of_Adults = int(input(" Number of Adults:\t\t "))

Number_Of_Children = int(input(" Number of Children:\t\t "))

Number_Of_Deserts = int(input(" Number of Deserts:\t\t "))

print("\n\nCost Of Meal Per Adult:\t\t" , Adult_Meal_Cost)

print("Cost of Meal Per Child:\t\t" , round(Child_Meal_Cost,2))

print("Cost Per Desert:\t\t" , round(Cost_Per_Desert,2))

# Processing/Calculations

Total_Adult_Meal_Cost = Adult_Meal_Cost* Number_Of_Adults

Total_Child_Meal_Cost = Child_Meal_Cost* Number_Of_Children

Total_Desert_Cost = Cost_Per_Desert* Number_Of_Deserts

Total_Food_Cost = Total_Adult_Meal_Cost + Total_Child_Meal_Cost + Total_Desert_Cost

Total_Taxes = Total_Food_Cost * Tax_Rate

Tips = Total_Food_Cost * Gratuity_Tips

Total_Bill = Total_Food_Cost + Total_Taxes + Tips + Room_Fee

# Output Section

print("\n\n Total Cost for Adult Meals: \t", Total_Adult_Meal_Cost)

print(" Total Cost for Childs Meals: \t", Total_Child_Meal_Cost)

print(" Total Cost for Desert: \t", Total_Desert_Cost)

print(" Total Food Cost: \t\t", Total_Food_Cost)

print("\n\n Plus 7.5% Taxes: \t\t", round(Total_Taxes,2))

print(" Plus 15.0% Tips: \t\t", round(Tips,2))

print(" Plus Room Fee: \t\t", Room_Fee)

print("\n\n Total Bill: \t\t\t", round(Total_Bill,2))

print(" Less Deposit: \t\t\t", Less_Deposit)

print("\n\nBalance Due: \t\t\t", round(Total_Bill - Less_Deposit,2))

print("\n\n\n\n\t\t Thank You For Using Passaic County Catering Services. ")

main()

input("\n\n\n\n\nPress Enter to Continue")