Menu-Driven Program for Bank Management System

Prerequisite: Switch Case in C/C++
Problem Statement: 
Write a program to build a simple Bank Management System using C++ which can perform the following operations: 

1. Open account
2. Deposit Money
3. Withdraw Money
4. Display Account

Approach: Below is the approach to do the above operations: 

1. Open Account: This method takes details from the customer like name, address, type of account, and depositing money and creating a new account.

// Method to Open a new account.
void Bank::open_account()
{
 // Enter Name of a Customer
 name = "xyz Gupta";

 cout << "Enter your full name: "
 << name << endl;

 // Enter City of a Customer
 address = "Banglore";
 cout << "Enter your address: "
 << address << endl;

 // Enter Type of Account(Saving or Current)
 acc_type = 'S';
 cout << "Type of account you want "
 << "to open saving(S) or Current(C): "
 << acc_type << endl;

 // Enter Amount to deposit
 balance = 8000;

 cout << "Enter the amount for deposit: "
 << balance << endl;
 cout << "Account Created Successfully";
}

2. Deposit Money: Deposit money function is created to deposit money to the account by asking amount by the customer. 
It will ask the amount and add it to the available balance. 
Total Balance = Available Balance + Deposited Amount

// Method to add balance in account
void Bank::deposit_money()
{
 int Amount;

 // Enter Amount to Deposit
 Amount = 9500;
 cout << "Enter How much money "
 << "you want to deposit: "
 << Amount << endl;

 // Total_Balance = Available_Balance + Amount
 balance += Amount;
 cout << "\Available Balance: "
 << balance;
}

3. Display Account: Display Account function will show the details of the customer like name, address, type of account and available balance. 

// Method to Display the details of account
void Bank::display_account()
{
 cout << "Name: " << name << endl
 << "Address: " << address << endl
 << "Type: " << acc_type << endl
 << "Balance: " << balance << endl
 << endl;
}

4. Withdraw Money: Withdraw money function is created to withdraw money from the account by asking amount by the customer. 
It will ask the amount and subtract it from the available balance. 
Total Balance = Available Balance - Withdrawal Amount

void Bank::withdraw_money()
{
 float amount;

 // Enter Amount to Withdraw
 amount = 3200;
 cout << "Enter How much money "
 << "you want to withdraw: "
 << amount << endl;

 // Total_Balance = Available_Balance - Withdrawal_Amount
 balance -= amount;
 cout << "Available balance: "
 << balance;
}

Below is the implementation of the above approach: 

1) Open account 

Enter your full name: Aman Jhurani
Enter your address: Surat
What type of account you want to open saving(S) or Current(C): S
Enter How much money you want to deposit: 8000
Account Created Successfully
-------------------------------------------------

2) Deposit account 

Enter how much money you want to deposit: 9500

 Available Balance: 17500
-------------------------------------------------

2) Withdraw money 

Enter how much money you want to withdraw: 3200

 Available balance: 14300
-------------------------------------------------

4) Display Account 

Name: Aman Jhurani
Address: Surat
Type: S
Balance: 14300


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Time Complexity: O(1), As each function is performing constant time operations
Auxiliary Space: O(1), As constant extra space is used.