用python写一个ATM的过程

以下是一个简单的 Python ATM 程序的示例，包括账户余额、存款、取款、更改密码等基本功能：

class ATM:
    def __init__(self, balance, pin):
        self.balance = balance
        self.pin = pin

    def check_balance(self):
        return self.balance

    def deposit(self, amount):
        self.balance += amount
        return self.balance

    def withdraw(self, amount):
        if amount > self.balance:
            return "Insufficient balance"
        else:
            self.balance -= amount
            return self.balance

    def change_pin(self, new_pin):
        self.pin = new_pin
        return "PIN successfully changed"

atm = ATM(1000, 1234)

print("Welcome to Python ATM")
pin = int(input("Please enter your PIN: "))

if pin == atm.pin:
    print("1. Check Balance")
    print("2. Deposit")
    print("3. Withdraw")
    print("4. Change PIN")

    option = int(input("Please select an option: "))
    if option == 1:
        print("Your balance is:", atm.check_balance())
    elif option == 2:
        amount = int(input("Please enter the amount to deposit: "))
        print("Your new balance is:", atm.deposit(amount))
    elif option == 3:
        amount = int(input("Please enter the amount to withdraw: "))
        print("Your new balance is:", atm.withdraw(amount))
    elif option == 4:
        new_pin = int(input("Please enter your new PIN: "))
        print(atm.change_pin(new_pin))
    else:
        print("Invalid option selected")
else:
    print("Incorrect PIN")

此程序创建了一个名为 `ATM` 的类，该类具有账户余额、密码等属性和方法。在程序的主函数中，用户输入他们的 PIN 码并验证它是否正确。然后，用户可以选择要执行的操作，包括检查余额、存款、取款和更改密码。程序将相应地调用相应的方法，并显示余额或其他选项。如果PIN码不正确，则程序将提示用户输入正确的PIN码。