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Simulate a basic ATM machine

Certification: Basic Level Accuracy: 66.67% Submissions: 6 Points: 5

Write a C# program to simulate a basic ATM machine. The ATM should handle operations like deposit, withdraw, and check balance.

Example 1
    
  
  • Input: 
      
      
    • Deposit(1000)
      • 
      
    • Withdraw(500)
      • 
      
    • CheckBalance()
      • 
    
    
  
    • 
  
  • Output: 
      
      
    • Deposit successful. New balance: 1000
      • 
      
    • Withdrawal successful. New balance: 500
      • 
      
    • Current balance: 500
      • 
    
    
  
    • 
  
  • Explanation: 
      
      
    • Step 1: Initialize the account with a balance of 0.
      • 
      
    • Step 2: Deposit 1000, increasing the balance to 1000.
      • 
      
    • Step 3: Withdraw 500, decreasing the balance to 500.
      • 
      
    • Step 4: CheckBalance returns the current balance, which is 500.
      • 
    
    
  
    •
Example 2
    
  
  • Input: 
      
      
    • Withdraw(200)
      • 
      
    • Deposit(-100)
      • 
      
    • Withdraw(1000)
      • 
      
    • CheckBalance()
      • 
    
    
  
    • 
  
  • Output: 
      
      
    • Insufficient funds. Current balance: 0
      • 
      
    • Invalid deposit amount. Amount must be positive.
      • 
      
    • Insufficient funds. Current balance: 0
      • 
      
    • Current balance: 0
      • 
    
    
  
    • 
  
  • Explanation: 
      
      
    • Step 1: Initialize the account with a balance of 0.
      • 
      
    • Step 2: Attempt to withdraw 200 fails due to insufficient balance.
      • 
      
    • Step 3: Attempt to deposit -100 fails because the amount is negative.
      • 
      
    • Step 4: Attempt to withdraw 1000 fails due to insufficient balance.
      • 
      
    • Step 5: CheckBalance returns the current balance, which is still 0.
      • 
    
    
  
    •
Constraints
    
  
  • The balance cannot be negative
    • 
  
  • Deposit amounts must be positive
    • 
  
  • Withdrawals cannot exceed the available balance
    • 
  
  • 0 ≤ Number of operations ≤ 100
    • 
  
  • 0 ≤ Transaction amounts ≤ 10^6
    • 
  
  • Time Complexity for all operations: O(1)
    • 
  
  • Space Complexity: O(1)
    •
Variables and Data TypesObject-Oriented ProgrammingSnowflakeSamsung
Editorial

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Hint
Solution

Solution Hints

    
  
  • Use a variable to keep track of the account balance.
    • 
  
  • Implement proper validation for all operations.
    • 
  
  • Return appropriate messages for successful and failed operations.
    • 
  
  • Consider adding a transaction history feature.
    • 
  
  • Handle edge cases like maximum withdrawal limits or daily transaction limits.
    •

Steps to solve by this approach:

 Step 1: Create a class with a balance variable and transaction history list.
 Step 2: Implement the Deposit method with validation for positive amounts.
 Step 3: Implement the Withdraw method with validation for sufficient balance and  positive amounts.
 Step 4: Implement the CheckBalance method to return the current balance.
 Step 5: Add transaction history functionality to log all operations.

Submitted Code :