Introduction

In this tutorial, we will create a simple C program that simulates a basic bank account. The program will allow users to perform essential banking functions like depositing money, withdrawing money, and checking their account balance. The objective is to demonstrate basic C programming concepts such as functions, conditionals, and loops to manage the operations of a bank account.

Objective

The goal of this program is to simulate a basic bank account with the following features:

• Deposit: Add funds to the account.
• Withdrawal: Remove funds from the account, ensuring there are sufficient funds available.
• Balance Check: Display the current balance of the account.

By the end of this tutorial, you will have a fully functional banking simulator that can handle these basic operations.

Bank Account Simulator Code

#include 

float balance = 0.0;  // Variable to store account balance

// Function to deposit money into the account
void deposit(float amount) {
    if (amount > 0) {
        balance += amount;
        printf("Deposited: %.2f\n", amount);
    } else {
        printf("Invalid deposit amount.\n");
    }
}

// Function to withdraw money from the account
void withdraw(float amount) {
    if (amount > 0 && amount <= balance) { balance -= amount; printf("Withdrawn: %.2f\n", amount); } else if (amount > balance) {
        printf("Insufficient funds.\n");
    } else {
        printf("Invalid withdrawal amount.\n");
    }
}

// Function to check the current balance
void check_balance() {
    printf("Current balance: %.2f\n", balance);
}

// Main function to execute the program
int main() {
    int choice;
    float amount;
    
    while (1) {
        // Menu for user input
        printf("\nBank Account Simulator\n");
        printf("1. Deposit\n");
        printf("2. Withdraw\n");
        printf("3. Check Balance\n");
        printf("4. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        
        switch (choice) {
            case 1:
                printf("Enter deposit amount: ");
                scanf("%f", &amount);
                deposit(amount);
                break;
            case 2:
                printf("Enter withdrawal amount: ");
                scanf("%f", &amount);
                withdraw(amount);
                break;
            case 3:
                check_balance();
                break;
            case 4:
                printf("Thank you for using the Bank Account Simulator!\n");
                return 0;
            default:
                printf("Invalid choice. Please try again.\n");
        }
    }
    
    return 0;
}

Explanation of the Program

This program simulates a basic bank account system and consists of the following parts:

• Global Variable: The variable balance stores the current balance of the account, initialized to 0.0.
• Functions:
  • deposit(float amount): This function allows the user to deposit a specified amount into the account. It checks if the amount is positive before adding it to the balance.
  • withdraw(float amount): This function allows the user to withdraw a specified amount from the account. It ensures that there are sufficient funds before completing the withdrawal.
  • check_balance(): This function displays the current account balance.
• Main Function: The main function provides a menu for the user to choose between depositing, withdrawing, checking the balance, or exiting the program. It uses a switch statement to execute the appropriate function based on user input.

How to Run the Program

Follow these steps to run the program:

1. Open a C programming environment or IDE (such as Code::Blocks, GCC, or Visual Studio).
2. Create a new C file and paste the above code into the file.
3. Compile the program using the command gcc filename.c -o bank_account (replace filename.c with your actual file name).
4. Run the compiled program using the command ./bank_account.
5. Follow the on-screen menu to interact with the bank account simulator.