Example Of a Bank Account

main.cpp

// A simple bank account program made in Visual C++ 2013
#include <iostream>
#include <vector>
#include <string>

using namespace std;

class Bank{
private:
	struct account_info
	{
		int acc_no;
		std::string acc_holder;
		std::string acc_type;
		double acc_balance;
	};

	std::vector<account_info>accounts;

	const int find_account(int id){
		size_t x = 0;
		int idx = (-1);

		while (x < accounts.size()){
			if (accounts[x].acc_no == id){
				idx = x;
				break;
			}
			x++;
		}
		return idx;
	}

	void acc_not_found(int n){
		std::cout << "Sorry no information was found for that account number." << std::endl;
	}

	void acc_invaild_no(void){
		std::cout << "The account number needs to be a positive value." << std::endl;
	}

	void acc_amount_positive(void){
		std::cout << "The amount entered needs to be a positive value." << std::endl;
	}

	bool is_positive(double value){
		if (value < 0)
			return false;
		return true;
	}

	int get_account(){
		int account_num = 0;
		std::cout << "Enter account number : ";
		std::cin >> account_num;
		return account_num;
	}

	std::string get_account_type(int account_id){
		char ch = accounts[account_id].acc_type[0];

		ch = toupper(ch);

		switch (ch)
		{
		case 'B':
			return "Basic account";
			break;
		case 'C':
			return "Current account";
			break;
		case 'S':
			return "Student account";
			break;
		default:
			break;
		}
		return "Unknown";
	}

public:

	void clear_accounts(){
		accounts.clear();
	}

	void display_accounts(){
		size_t ids = 0;
		int itr;

		for (ids = 0; ids < accounts.size(); ids++){
			std::cout << std::endl;
			std::cout << " +---------------Account Details-----------------+" << std::endl;
			std::cout << " Account Number   : " << accounts[ids].acc_no << std::endl;
			std::cout << " Account holder   : " << accounts[ids].acc_holder << std::endl;
			std::cout << " Account type     : " << this->get_account_type(ids) << std::endl;
			std::cout << " Account balance  : " << accounts[ids].acc_balance << std::endl;
			std::cout << " +--------------Bens Banking System--------------+" << std::endl;
			std::cout << std::endl;
		}

		if (ids == 0){
			std::cout << "Sorry there were no accounts found on this system." << std::endl;
		}

	}

	void close_account(void){
		int account_num = 0;
		vector<account_info>temp;
		account_info ai;

		account_num = get_account();

		if (!is_positive(account_num)){
			acc_invaild_no();
		}
		else{
			int ids = find_account(account_num);

			if (ids == -1){
				acc_not_found(account_num);
			}
			else{
				for (size_t x = 0; x < accounts.size();x++){
					ai = accounts[x];
					if (ai.acc_no != account_num){
						temp.push_back(ai);
					}
				}
				accounts = temp;
				temp.clear();
				std::cout << "The account was successfully closed." << std::endl;
			}
		}
	}

	void new_account(void){
		account_info ai;
		int acc_tmp = 0;
		ai.acc_no = get_account();

		if (ai.acc_no < 0){
			acc_invaild_no();
		}
		else if (find_account(ai.acc_no) != -1){
			std::cout << "The account is already created." << std::endl <<
				"Please try a different account number." << std::endl;
		}
		else{
			cin.ignore();
			std::cout << "Enter the account's holder name : ";
			getline(cin, ai.acc_holder);
			std::cout << std::endl;
			std::cout << "+----- Account types -----+" << std::endl;
			std::cout << "+ [B] Basic account       +" << std::endl;
			std::cout << "+ [C] Current account     +" << std::endl;
			std::cout << "+ [S] Student account     +" << std::endl;
			std::cout << "+-------------------------+" << std::endl;
			std::cout << "Enter account type B, C or S : ";

			std::cin >> ai.acc_type;
			std::cout << "Enter the account of money to you wish to deposit to the new account : ";
			std::cin >> ai.acc_balance;

			if (!is_positive(ai.acc_balance)){
				acc_amount_positive();
			}
			else{
				accounts.push_back(ai);
				std::cout << "The new account was successfully created." << std::endl;
			}
		}
	}

	void account_details(){
		int account_num = 0;

		account_num = get_account();

		if (!is_positive(account_num)){
			acc_invaild_no();
		}
		else{
			int ids = find_account(account_num);

			if (ids == -1){
				acc_not_found(account_num);
			}
			else{
				system("cls");
				std::cout << std::endl;
				std::cout << " +---------------Account Details-----------------+" << std::endl;
				std::cout << " Account holder   : " << accounts[ids].acc_holder << std::endl;
				std::cout << " Account type     : " << this->get_account_type(ids) << std::endl;
				std::cout << " Account balance  : " << accounts[ids].acc_balance << std::endl;
				std::cout << " +--------------Bens Banking System--------------+" << std::endl;
				std::cout << std::endl;
			}
		}
	}

	void Deposit(){
		int account_num = 0;
		double amount = 0;

		account_num = get_account();

		if (!is_positive(account_num)){
			acc_invaild_no();
		}
		else{
			int ids = find_account(account_num);

			if (ids == -1){
				acc_not_found(account_num);
			}
			else{
				std::cout << "Enter the account of money to you wish to deposit to this account : ";
				std::cin >> amount;

				if (!is_positive(amount)){
					acc_amount_positive();
				}
				else{
					std::cout << amount << " has been deposited to your account." << std::endl;
					accounts[ids].acc_balance += amount;
					std::cout << "Your new balance is : " << accounts[ids].acc_balance << std::endl;
				}
			}
		}
	}

	void withdraw(){
		int account_num = 0;
		double wd = 0;

		account_num = get_account();

		if (!is_positive(account_num)){
			acc_invaild_no();
		}
		else{
			int ids = find_account(account_num);

			if (ids == -1){
				acc_not_found(account_num);
			}
			else{
				std::cout << "Enter amount to withdraw : ";
				std::cin >> wd;

				if (!is_positive(wd)){
					acc_amount_positive();
				}
				else if ((accounts[ids].acc_balance - wd) < 0){
					std::cout << "Sorry you do not have enough money to withdraw." << std::endl;
				}
				else{
					accounts[ids].acc_balance -= wd;
					std::cout << wd << " has been withdrawn from your account." << std::endl;
					std::cout << "Your remaining balance is : " << accounts[ids].acc_balance << std::endl;
				}
			}
		}
	}
};

void show_menu(void){
	system("cls");
	std::cout << std::endl;
	std::cout << " +---- Bens Bank System ---+" << std::endl;
	std::cout << " + [1] New Account         +" << std::endl;
	std::cout << " + [2] Account details     +" << std::endl;
	std::cout << " + [3] Deposit             +" << std::endl;
	std::cout << " + [4] Withdraw            +" << std::endl;
	std::cout << " + [5] Show All Accounts   +" << std::endl;
	std::cout << " + [6] Close Account       +" << std::endl;
	std::cout << " + [7] Exit                +" << std::endl;
	std::cout << " +-------------------------+" << std::endl;
	std::cout << " Enter Option : ";
}

int main(){
	int ch = 0;
	Bank bank;

	do{
		show_menu();
		std::cin >> ch;

		if (!ch >= 1 && ch <= 7){
			break;
		}

		switch (ch)
		{
		case 1:
			system("cls");
			bank.new_account();
			system("pause");
			break;
		case 2:
			system("cls");
			bank.account_details();
			system("pause");
			break;
		case 3:
			system("cls");
			bank.Deposit();
			system("pause");
			break;
		case 4:
			system("cls");
			bank.withdraw();
			system("pause");
			break;
		case 5:
			system("cls");
			bank.display_accounts();
			system("pause");
			break;
		case 6:
			system("cls");
			bank.close_account();
			system("pause");
			break;
		default:
			break;
		}

		cin.clear();
		cin.ignore();
	} while (ch != 7);

	bank.clear_accounts();
	return 0;
}