Question

Working on a C++ banking program, need assistance in formulating following functions:

-function depositMoney, which receives three parameters (the index of the

account in the array, the amount to be deposited, and the array of accounts). The function will

update the balance and will save the transactions information (including the date and time) in the

file that has the same name as the account number.

-function withdrawMoney, which receives three parameters (the index of the

account in the array, the amount to be withdrawn, and the array of accounts). The function will

update the balance and will save the transactions information (including the date and time) in the

file that has the same name as the account number.

-function openAccount, which asks for the account owner’s information (e.g.

name and opening balance). The function will add a new record to the array of accounts and

accounts.txt as well as create a new file (with the same name as the account number) and update

the transactions information (including the date and time) with the opening balance.

Answer 1

Please find the code for the problem below. I have added comments extensively to make it understandable.

#include<bits/stdc++.h>
using namespace std;

/*
* allAccounts contains the list of active accounts
* numAccounts is the number of active accounts
* A new account is assigned the same number as numAccounts
* The transactions of an account are saved in a text file of the form "Account_number.txt"
* "accounts.txt" contains the list of all accounts
*/

struct Account{
   string name;
   int acno;
   int balance;
};

//total number of accounts

int numAccounts;

//Array of all accounts in the bank;

Account allAccounts[100];

//helper function to print a Transaction

void printTransaction(int acno, int deposit){
   ofstream acc;
   acc.open(to_string(acno)+".txt", ios::app);
   time_t t = std::time(0); // get time now
   acc<<ctime(&t)<<"Deposit of: "<<deposit<<"\n";
   acc.close();
}

//helper function to print Account details on the console

void printAccountDetails(Account a){
   cout<<"Account name: "<<a.name<<endl;
   cout<<"Account num: "<<a.acno<<endl;
   cout<<"Current balance: "<<a.balance<<endl;
}

//function for opening a new bank account

void openAccount(){
   string name;
   int balance, acno;
   acno = numAccounts;
   cout<<"Enter Account Name: ";
   cin>>name;
   cout<<"Enter opening balance: ";
   cin>>balance;
  
   //Adds the account to allAccounts Array
  
   allAccounts[numAccounts].name = name;
   allAccounts[numAccounts].acno = numAccounts;
   allAccounts[numAccounts].balance = balance;
  
   //updates the account in accounts.txt
  
   ofstream accountInfoFile;
   accountInfoFile.open("account.txt");
   accountInfoFile<<"Account Name: "<<name<<" "<<" Opening balance "<<balance<<" Account num: "<<numAccounts<<"\n";
   accountInfoFile.close();
  
   //prints the transactions corresponding to the opening balance
  
   printTransaction(acno, balance);
   cout<<"Successfully created account: "<<endl;
   printAccountDetails(allAccounts[numAccounts]);
   numAccounts++;
  
}

//function to deposit a given amount into an account

void depositMoney(int accountIndex, Account* allAccounts, int dep){
  
   //adding the money to the account
  
   allAccounts[accountIndex].balance += dep;
  
   //printing the transaction
  
   printTransaction(accountIndex, dep);
}

//function to withdraw a given amount from an account

void withdrawMoney(int accountIndex, Account* allAccounts, int with){
  
   //If the withdrawn amount is greater than the current balance throw error
  
   if (allAccounts[accountIndex].balance < with){
       cout<<"Insufficient Balance!!!!!\n";
   }
   else {
       allAccounts[accountIndex].balance -= with;
       printTransaction(accountIndex, -with);  
   }
}

int main(){
   int choice;
   do {
      
       //Sample menu for performing the specified operations
      
       cout<<"******************************\nMENU\n";
       cout<<"Press 1 to open an account\n";
       cout<<"Press 2 to make a deposit in an account\n";
       cout<<"Press 3 to withdraw from an account\n";
       cout<<"Press 4 to exit\n";
       cout<<"******************************\n";
      
       cin>>choice;
       int ac, dep;
      
       switch(choice){
           case 1: openAccount();
                   break;
           case 2: cout<<"Enter account num to deposit money: ";
                   cin>>ac;
                   cout<<"Enter the amount to be deposited: ";
                   cin>>dep;
                   depositMoney(ac, allAccounts, dep);
                   break;
           case 3: cout<<"Enter account num to withdraw money: ";
                   cin>>ac;
                   cout<<"Enter the amount to be withdrawn: ";
                   cin>>dep;
                   withdrawMoney(ac, allAccounts, dep);
                   break;
           case 4: break;
           default: cout<<"Invalid Choice!!!!\nTry Again\n";
                   break;
       }
   }
   while(choice != 4);
   return 0;
}