如何在完成处理后返回主菜单

Question

import random
import math

main_menu = ["1 - Display Balance","2 - Withdraw Funds","3 - Deposit Funds","9 - Return Card"]
print("Welcome to Northern Frock")
print(main_menu[0])
print(main_menu[1])
print(main_menu[2])
print(main_menu[3])

atm_input_1 = int(input("Select 1 to display the current balance and the maximum amount available for withdrawal (In £10 increments) \n select 2 to view avalaible withdrawal amounts \n Select 3 to deposit funds \n select 9 to return card!"))
current_balance = random.randint(10,1000)
withdrawal_balance = math.floor(current_balance/10)*10

if atm_input_1 == 1:
    
    print("Current Balance:","£",current_balance)
    
    print("Withdrawal Balance:","£",withdrawal_balance)

elif atm_input_1 == 2:
    sub_menu = ["1 - £10","2 - £20","3 - £40","4 - £60","5 - £80","6 - £100","7 - Other amount","8 - Return to main menu"]
    print("Please select withdrawal amount")
    print(sub_menu[0])
    print(sub_menu[1])
    print(sub_menu[2])
    print(sub_menu[3])
    print(sub_menu[4])
    print(sub_menu[5])
    print(sub_menu[6])
    print(sub_menu[7])

    sub_menu_input = int(input("Please select a number from the options below"))
    if (sub_menu_input == 1 ):
        if (withdrawal_balance >= 10):
            print("£10 successfully withdrawed from account")
            current_balance - 10
            withdrawal_balance - 10
            print("Current Balance:","£",current_balance)
            print("Withdrawal Balance:","£",withdrawal_balance)

        else: print("Sorry you currrently have insufficent funds for a withdrawal")
    elif (sub_menu_input == 2 ):
        if (withdrawal_balance >= 10):
            print("£20 successfully withdrawed from account")
            current_balance - 20
            withdrawal_balance - 20
            print("Current Balance:","£",current_balance)
            print("Withdrawal Balance:","£",withdrawal_balance)

        else: print("Sorry you currrently have insufficent funds for a withdrawal")    

    elif (sub_menu_input == 3 ):
        if (withdrawal_balance >= 10):
            print("£40 successfully withdrawed from account")
            current_balance - 40
            withdrawal_balance - 40
            print("Current Balance:","£",current_balance)
            print("Withdrawal Balance:","£",withdrawal_balance)

        else: print("Sorry you currrently have insufficent funds for a withdrawal")    
    
    elif (sub_menu_input == 4 ):
        if (withdrawal_balance >= 10):
            print("£60 successfully withdrawed from account")
            current_balance - 60
            withdrawal_balance - 60
            print("Current Balance:","£",current_balance)
            print("Withdrawal Balance:","£",withdrawal_balance)

        else: print("Sorry you currrently have insufficent funds for a withdrawal")    

    elif (sub_menu_input == 5 ):
        if (withdrawal_balance >= 10):
            print("£80 successfully withdrawed from account")
            current_balance - 80
            withdrawal_balance - 80
            print("Current Balance:","£",current_balance)
            print("Withdrawal Balance:","£",withdrawal_balance)

        else: print("Sorry you currrently have insufficent funds for a withdrawal")    

    elif (sub_menu_input == 6 ):
        if (withdrawal_balance >= 10):
            print("£100 successfully withdrawed from account")
            current_balance - 100
            withdrawal_balance - 100
            print("Current Balance:","£",current_balance)
            print("Withdrawal Balance:","£",withdrawal_balance)

        else: print("Sorry you currrently have insufficent funds for a withdrawal")

    elif(sub_menu_input == 7):
         withdrawal_request = int(input("Please enter amount you wish to withdraw (In a £10 sequence"))
         if withdrawal_request % 10 == 0:
                if withdrawal_balance >= withdrawal_request:
                    print("£",withdrawal_balance,"successfully withdrawed from account")
                    current_balance - withdrawal_request
                    withdrawal_balance - withdrawal_request
                    print("Current Balance:","£",current_balance)
                    print("Withdrawal Balance:","£",withdrawal_balance)

         else:print("ERROR Invalid withdrawal request")

elif atm_input_1 == 3:
    deposit_request = int(input("Please enter the amount you wish to deposit into your account"))
    current_balance = current_balance + deposit_request
    withdrawal_balance = math.floor((withdrawal_balance + deposit_request)/10)*10
    print("you have successfully deposited £",deposit_request,"into your account")
    print("updated balances:")
    print("Current Balance:","£",current_balance)
    print("Withdrawal Balance:","£",withdrawal_balance)

elif atm_input_1 == 9:
    print("Card returned , thank you for banking with Northern Frock good day")
    quit()

else: print("Error invalid selection try again")

问题(我可以完成所有的要求，但是在完成撤回/保存者/平衡检查之后，我很难让代码返回到主>菜单?)编写一个模拟基本ATM行为的程序。

请按照以下说明行事：

1. 打印主菜单：

欢迎光临北衣

1. 1 -显示天平

1. 2 -提取资金

1. 3 -存款基金

1. 9 -返回卡输入一个选项: 6。如果输入“1”，显示当前余额和可提取的最大金额(必须是to 10的倍数)，然后返回主菜单。7.如果输入“2”，请打印一个提取金额为: 8. 1-13 10. 2-13 20 10.3-13 40 11. 4-13 60.5-13 80 13. 6

的子菜单。

• is 100 14.7-其他数额为15.8-返回主菜单输入一个选项: a.如果选择‘1到6’，检查是否允许所请求的取款，打印一条消息以显示资金已被提取，计算新余额并返回主菜单。如果选择‘7’，则提示用户输入一个整数值。检查这个号码是10的倍数，并确认提款是允许的，打印一条消息显示钱已经提取，计算新的余额并返回主菜单。如果选择‘8’，返回主菜单。16.如果输入“3”，则提供另一个菜单，允许用户输入存款金额(不必是£10的倍数)、返回主菜单或返回卡。如果资金已存入，请提供适当的反馈，并更新余额并返回主菜单。17.如果输入‘9’，打印一条再见消息并退出(中断)。

如果输入了另一个值，则打印错误消息并再次打印菜单.

1. .

Answer 1

解决方案是将整个程序放在一个无休止的循环中，如下所示：

import random
import math

while True:
    main_menu = ["1 - Display Balance","2 - Withdraw Funds","3 - Deposit Funds","9 - Return Card"]
    print("Welcome to Northern Frock")
    print(main_menu[0])
    print(main_menu[1])
    print(main_menu[2])
    print(main_menu[3])
    
    atm_input_1 = int(input("Select 1 to display the current balance and the maximum amount available for withdrawal (In £10 increments) \n select 2 to view avalaible withdrawal amounts \n Select 3 to deposit funds \n select 9 to return card!"))
    current_balance = random.randint(10,1000)
    withdrawal_balance = math.floor(current_balance/10)*10
    
    if atm_input_1 == 1:
        
        print("Current Balance:","£",current_balance)
        
        print("Withdrawal Balance:","£",withdrawal_balance)
    
    elif atm_input_1 == 2:
        sub_menu = ["1 - £10","2 - £20","3 - £40","4 - £60","5 - £80","6 - £100","7 - Other amount","8 - Return to main menu"]
        print("Please select withdrawal amount")
        print(sub_menu[0])
        print(sub_menu[1])
        print(sub_menu[2])
        print(sub_menu[3])
        print(sub_menu[4])
        print(sub_menu[5])
        print(sub_menu[6])
        print(sub_menu[7])
    
        sub_menu_input = int(input("Please select a number from the options below"))
        if (sub_menu_input == 1 ):
            if (withdrawal_balance >= 10):
                print("£10 successfully withdrawed from account")
                current_balance - 10
                withdrawal_balance - 10
                print("Current Balance:","£",current_balance)
                print("Withdrawal Balance:","£",withdrawal_balance)
    
            else: print("Sorry you currrently have insufficent funds for a withdrawal")
        elif (sub_menu_input == 2 ):
            if (withdrawal_balance >= 10):
                print("£20 successfully withdrawed from account")
                current_balance - 20
                withdrawal_balance - 20
                print("Current Balance:","£",current_balance)
                print("Withdrawal Balance:","£",withdrawal_balance)
    
            else: print("Sorry you currrently have insufficent funds for a withdrawal")    
    
        elif (sub_menu_input == 3 ):
            if (withdrawal_balance >= 10):
                print("£40 successfully withdrawed from account")
                current_balance - 40
                withdrawal_balance - 40
                print("Current Balance:","£",current_balance)
                print("Withdrawal Balance:","£",withdrawal_balance)
    
            else: print("Sorry you currrently have insufficent funds for a withdrawal")    
        
        elif (sub_menu_input == 4 ):
            if (withdrawal_balance >= 10):
                print("£60 successfully withdrawed from account")
                current_balance - 60
                withdrawal_balance - 60
                print("Current Balance:","£",current_balance)
                print("Withdrawal Balance:","£",withdrawal_balance)
    
            else: print("Sorry you currrently have insufficent funds for a withdrawal")    
    
        elif (sub_menu_input == 5 ):
            if (withdrawal_balance >= 10):
                print("£80 successfully withdrawed from account")
                current_balance - 80
                withdrawal_balance - 80
                print("Current Balance:","£",current_balance)
                print("Withdrawal Balance:","£",withdrawal_balance)
    
            else: print("Sorry you currrently have insufficent funds for a withdrawal")    
    
        elif (sub_menu_input == 6 ):
            if (withdrawal_balance >= 10):
                print("£100 successfully withdrawed from account")
                current_balance - 100
                withdrawal_balance - 100
                print("Current Balance:","£",current_balance)
                print("Withdrawal Balance:","£",withdrawal_balance)
    
            else: print("Sorry you currrently have insufficent funds for a withdrawal")
    
        elif(sub_menu_input == 7):
             withdrawal_request = int(input("Please enter amount you wish to withdraw (In a £10 sequence"))
             if withdrawal_request % 10 == 0:
                    if withdrawal_balance >= withdrawal_request:
                        print("£",withdrawal_balance,"successfully withdrawed from account")
                        current_balance - withdrawal_request
                        withdrawal_balance - withdrawal_request
                        print("Current Balance:","£",current_balance)
                        print("Withdrawal Balance:","£",withdrawal_balance)
    
             else:print("ERROR Invalid withdrawal request")
    
    elif atm_input_1 == 3:
        deposit_request = int(input("Please enter the amount you wish to deposit into your account"))
        current_balance = current_balance + deposit_request
        withdrawal_balance = math.floor((withdrawal_balance + deposit_request)/10)*10
        print("you have successfully deposited £",deposit_request,"into your account")
        print("updated balances:")
        print("Current Balance:","£",current_balance)
        print("Withdrawal Balance:","£",withdrawal_balance)
    
    elif atm_input_1 == 9:
        print("Card returned , thank you for banking with Northern Frock good day")
        quit()
    
    else: print("Error invalid selection try again")

然后，每当您想要停止程序，只需做一个“中断”语句，以退出循环。