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20ATM_system.py
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20ATM_system.py
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# 20. Build a simulation of ATM system with classes for accounts,
# transactions, and users. Implement methods for withdrawing
# cash, checking balances, and handling PIN verification.
class Account:
def __init__(self, account_number, pin, balance=0):
self.account_number = account_number
self.pin = pin
self.balance = balance
def check_balance(self):
return self.balance
def withdraw_cash(self, amount):
if amount > 0 and amount <= self.balance:
self.balance -= amount
return True
else:
return False
def add_money(self, amount):
if amount > 0:
self.balance += amount
return True
else:
return False
class Transaction:
@staticmethod
def verify_pin(user_pin, entered_pin):
return user_pin == entered_pin
def main():
accounts = []
while True:
print("\nATM Simulation")
print("1. Create Account")
print("2. Login")
print("3. Exit")
choice = input("Enter your choice (1-3): ")
if choice == "1":
account_number = input("Enter account number: ")
pin = input("Enter PIN: ")
accounts.append(Account(account_number, pin))
print("Account created successfully!")
elif choice == "2":
account_number = input("Enter account number: ")
pin = input("Enter PIN: ")
user_account = next((account for account in accounts if account.account_number == account_number), None)
if user_account and Transaction.verify_pin(user_account.pin, pin):
print("\nLogin successful!")
while True:
print("\n1. Check Balance")
print("2. Withdraw Cash")
print("3. Add Money")
print("4. Logout")
option = input("Enter your choice (1-4): ")
if option == "1":
print(f"Current Balance: ${user_account.check_balance()}")
elif option == "2":
amount = float(input("Enter the amount to withdraw: $"))
if user_account.withdraw_cash(amount):
print(f"Withdrawal successful! Remaining Balance: ${user_account.check_balance()}")
else:
print("Invalid withdrawal amount or insufficient funds.")
elif option == "3":
amount = float(input("Enter the amount to add: $"))
if user_account.add_money(amount):
print(f"Money added successfully! New Balance: ${user_account.check_balance()}")
else:
print("Invalid amount to add.")
elif option == "4":
print("Logging out...")
break
else:
print("Invalid choice. Please enter a number between 1 and 4.")
else:
print("Invalid account number or PIN. Please try again.")
elif choice == "3":
print("Exiting ATM. Goodbye!")
break
else:
print("Invalid choice. Please enter a number between 1 and 3.")
if __name__ == "__main__":
main()