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#include <iostream> #include <iomanip> // For std::setw and std::setprecision using namespace std; // Function prototypes void displayMenu(); void checkBalance(double balance); void deposit(double &balance); void withdraw(double &balance); int main() { double balance = 0.0; // Initial balance int choice; do { displayMenu(); cin >> choice; switch (choice) { case 1: checkBalance(balance); break; case 2: deposit(balance); break; case 3: withdraw(balance); break; case 4: cout << "Exiting the ATM. Have a great day!" << endl; break; default: cout << "Invalid choice. Please select a valid option." << endl; break; } } while (choice != 4); return 0; } // Function to display the ATM menu void displayMenu() { cout << "\nATM Menu" << endl; cout << "1. Check Balance" << endl; cout << "2. Deposit Money" << endl; cout << "3. Withdraw Money" << endl; cout << "4. Exit" << endl; cout << "Enter your choice: "; } // Function to check and display the current balance void checkBalance(double balance) { cout << fixed << setprecision(2); // Set precision for displaying currency cout << "Current Balance: $" << balance << endl; } // Function to deposit money into the account void deposit(double &balance) { double amount; cout << "Enter amount to deposit: $"; cin >> amount; if (amount > 0) { balance += amount; cout << "Deposited $" << amount << ". New Balance: $" << balance << endl; } else { cout << "Invalid deposit amount. Please enter a positive value." << endl; } } // Function to withdraw money from the account void withdraw(double &balance) { double amount; cout << "Enter amount to withdraw: $"; cin >> amount; if (amount > 0 && amount <= balance) { balance -= amount; cout << "Withdrew $" << amount << ". New Balance: $" << balance << endl; } else if (amount > balance) { cout << "Insufficient funds. Withdrawal amount exceeds balance." << endl; } else { cout << "Invalid withdrawal amount. Please enter a positive value." << endl; } } |
Explanation
- Include Libraries:
#include <iostream>: For input and output operations.#include <iomanip>: For formatting the output (e.g., setting decimal precision).
- Function Prototypes:
void displayMenu();: Displays the ATM menu.void checkBalance(double balance);: Displays the current balance.void deposit(double &balance);: Allows depositing money and updates the balance.void withdraw(double &balance);: Allows withdrawing money and updates the balance.
- Main Function:
- Initializes
balanceto0.0. - Runs a
do-whileloop to repeatedly show the menu and perform operations based on user input. - Uses a
switchstatement to handle different user choices.
- Initializes
- Menu Display Function (
displayMenu):- Outputs the available options to the console.
- Check Balance Function (
checkBalance):- Displays the current balance formatted to two decimal places.
- Deposit Function (
deposit):- Takes the deposit amount from the user.
- Checks if the amount is positive before adding it to the balance.
- Withdraw Function (
withdraw):- Takes the withdrawal amount from the user.
- Checks if the amount is positive and does not exceed the current balance before subtracting it from the balance.
- Provides appropriate messages if the withdrawal is invalid or exceeds the balance.