Bank Management.cpp

#include<iostream>
#include<fstream>
#include<cctype> //The C++ <cctype> header file declares a set of functions to classify (and transform) individual characters. For example, isupper() checks whether a character is uppercase or not.
#include<iomanip> //iomanip is a library that is used to manipulate the output of C++ program. Using C++, header providing parametric manipulators

using namespace std;

class account
{
    int acno;
    char name[100];
    int deposit;
    char type;
public:
    void create_account();  //function to get data from user
    void show_account() const;  //function to show data on screen
    void modify(); //function to add new data
    void dep(int); //function to accept amount and add to balance amt
    void draw(int); //function to accept amount and subtract from balance amt
    void report() const; //function to show data in tabular form
    int retacno() const; //function to return account number
    int retdeposit() const; //function to return balance amount
    char rettype() const; //function to return type of account
};

void account::create_account()  //:: = Scope resolution operator is used to qualify hidden names so that you can still use them.
{

    cout<<"\n Enter the Account Number: ";
    cin>>acno;
    cout<<"\n Enter the name of the account: ";
    cin.ignore(); // it is used when we need to take the string input by ignoring the number input.
    //Maybe we need to remove the undesirable buffer so that the next data is stored in the intended container rather than the preceding variable’s cache.
    cin.getline(name,50);
    cout<<"\n Enter the type of account(C/S):";
    cin>>type;
    type=toupper(type);//The toupper() function is used to convert lowercase alphabet to uppercase.
    cout<<"\n Enter the initial amount to deposit(>=500 for savings and >=1000 for current) : ";
    cin>>deposit;
    cout<<"\n CONGRATULATIONS YOUR ACCOUNT IS CREATED ";

}
void account::show_account() const
{
    cout<<"\nAccount No: "<<acno;
    cout<<"\nAccount Holder Name: ";
    cout<<name;
    cout<<"\nType of Account : "<<type;
    cout<<"\nBalance amount : "<<deposit;
}

void account::modify()
{
	cout<<"\nAccount No. : "<<acno;
	cout<<"\nModify Account Holder Name : ";
	cin.ignore();
	cin.getline(name,50);
	cout<<"\nModify Type of Account : ";
	cin>>type;
	type=toupper(type);
	cout<<"\nModify Balance amount : ";
	cin>>deposit;
}

void account::dep(int x)
{
    deposit+=x;
}

void account::draw(int x)
{
    deposit-=x;
}

void account::report() const
{
	cout<<acno<<setw(10)<<" "<<name<<setw(10)<<" "<<type<<setw(6)<<deposit<<endl; //setw = setw function is a C++ manipulator which stands for set width.
}


int account::retacno() const
{
	return acno;
}

int account::retdeposit() const
{
	return deposit;
}

char account::rettype() const
{
	return type;
}

void write_account();	//function to write record in binary file
void display_sp(int);	//function to display account details given by user
void modify_account(int);	//function to modify record of file
void delete_account(int);	//function to delete record of file
void display_all();		//function to display all account details
void deposit_withdraw(int, int); // function to desposit/withdraw amount for given account
void intro();	//introductory screen function


int main()
{
    char ch;
    int num;
    intro();
    do{
        system("cls");
        cout<<"\n\n\n\tMAIN MENU";
        cout<<"\n\n\t01. NEW ACCOUNT";
        cout<<"\n\n\t02. DEPOSIT AMOUNT";
        cout<<"\n\n\t03. WITHDRAW AMOUNT";
        cout<<"\n\n\t04. BALANCE ENQUIRY";
        cout<<"\n\n\t05. ALL ACCOUNT HOLDER LIST";
        cout<<"\n\n\t06. CLOSE AN ACCOUNT";
        cout<<"\n\n\t07. MODIFY ACCOUNT";
        cout<<"\n\n\t08. EXIT";
        cout<<"n\n\tSelect Your Option (1-8) ";
        cin>>ch;
        system("cls");
        switch(ch)
        {
            case '1':
			write_account();
			break;
		case '2':
			cout<<"\n\n\tEnter The account No. : "; cin>>num;
			deposit_withdraw(num, 1);
			break;
		case '3':
			cout<<"\n\n\tEnter The account No. : "; cin>>num;
			deposit_withdraw(num, 2);
			break;
		case '4':
			cout<<"\n\n\tEnter The account No. : "; cin>>num;
			display_sp(num);
			break;
		case '5':
			display_all();
			break;
		case '6':
			cout<<"\n\n\tEnter The account No. : "; cin>>num;
			delete_account(num);
			break;
		 case '7':
			cout<<"\n\n\tEnter The account No. : "; cin>>num;
			modify_account(num);
			break;
		 case '8':
			cout<<"\n\n\tThanks for using bank managemnt system";
			break;
		 default :cout<<"\a";
		}
		cin.ignore();
		cin.get();
	}while(ch!='8');
	return 0;
}

//function to write in binary file
void write_account()
{
    account ac;
    ofstream outFile; //This data type represents the output file stream and is used to create files and to write information to files
    outFile.open("account.dat",ios::binary|ios::app);
    ac.create_account();
    outFile.write(reinterpret_cast<char*>(&ac), sizeof(account)); //reinterpret_cast is a type of casting operator used in C++.
//data_type *var_name =
       //reinterpret_cast <data_type *>(pointer_variable);
    outFile.close(); //c++ output file
}

//function to read specific record from file
void display_sp(int n)
{
    account ac;
    bool flag = false;
    ifstream inFile;
    inFile.open("account.dat",ios::binary);
    if(!inFile)
    {
       cout<<"File could not be open !! Press any Key...";
		return;
    }
    cout<<"\nBALANCE DETAILS\n";

    	while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
	{
		if(ac.retacno()==n)
		{
			ac.show_account();
			flag=true;
		}
	}
	inFile.close();
	if(flag==false)
		cout<<"\n\nAccount number does not exist";
}

void modify_account(int n)
{
  bool found=false;
  account ac;
  fstream File;
  File.open("account.dat",ios::binary|ios::in|ios::out);
  if(!File)
  {
    cout<<"File could not be open !! Press any Key...";
    return;
  }
  while(!File.eof() && found==false)
  {
      File.read(reinterpret_cast<char *> (&ac), sizeof(account));
      if(ac.retacno()==n)
      {
         ac.show_account();
			cout<<"\n\nEnter The New Details of account"<<endl;
			ac.modify();
			int pos=(-1)*static_cast<int>(sizeof(account));
			File.seekp(pos,ios::cur);
			File.write(reinterpret_cast<char *> (&ac), sizeof(account));
			cout<<"\n\n\t Record Updated";
			found=true;
      }
  }
  File.close();
	if(found==false)
		cout<<"\n\n Record Not Found ";
}

void delete_account(int n)
{
	account ac;
	ifstream inFile;
	ofstream outFile;
	inFile.open("account.dat",ios::binary);
	if(!inFile)
	{
		cout<<"File could not be open !! Press any Key...";
		return;
	}
	outFile.open("Temp.dat",ios::binary);
	inFile.seekg(0,ios::beg);
	while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
	{
		if(ac.retacno()!=n)
		{
			outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
		}
	}
	inFile.close();
	outFile.close();
	remove("account.dat");
	rename("Temp.dat","account.dat");
	cout<<"\n\n\tRecord Deleted ..";
}

void display_all()
{
    account ac;
    ifstream inFile;
    inFile.open("account.dat",ios::binary);
    if(!inFile)
    {
        cout<<"File could not be open !! Press any key...";
        return;
    }
    cout<<"\n\n\t\tACCOUNT HOLDER LIST\n\n";
	cout<<"====================================================\n";
	cout<<"A/c no.      NAME           Type  Balance\n";
	cout<<"====================================================\n";
	while(inFile.read(reinterpret_cast<char*> (&ac),sizeof(account)))
	{
	    ac.report();
	}
	inFile.close();
}

void deposit_withdraw(int n, int option)
{
    int amt;
    bool found=false;
    account ac;
    fstream File;
    File.open("account.dat",ios::binary|ios::in|ios::out);
    if(!File)
    {
        cout<<"File could not be open !! Press any key...";
        return;
    }
    while(!File.eof() && found==false)
    {
        File.read(reinterpret_cast<char*>(&ac), sizeof(account));
        if(ac.retacno()==n)
        {
           ac.show_account();
			if(option==1)
			{
				cout<<"\n\n\tTO DEPOSITE AMOUNT ";
				cout<<"\n\nEnter The amount to be deposited";
				cin>>amt;
				ac.dep(amt);
			}
			if(option==2)
			{
				cout<<"\n\n\tTO WITHDRAW AMOUNT ";
				cout<<"\n\nEnter The amount to be withdraw";
				cin>>amt;
				int bal=ac.retdeposit()-amt;
				if((bal<500 && ac.rettype()=='S') || (bal<1000 && ac.rettype()=='C'))
					cout<<"Insufficient balance";
				else
					ac.draw(amt);
			}
			int pos=(-1)*static_cast<int>(sizeof(ac));
			File.seekp(pos,ios::cur);
			File.write(reinterpret_cast<char *> (&ac), sizeof(account));
			cout<<"\n\n\t Record Updated";
			found=true;
	       }
         }
	File.close();
	if(found==false)
		cout<<"\n\n Record Not Found ";
}

void intro()
{
    cout<<"\n\n\t BANK MANGEMENT SYSTEM";
    cout<<"\n\n\t Press ENTER for Main Menu";

    cin.get(); //is used for accessing character array. It includes white space characters. Generally, cin with an extraction operator (>>) terminates when whitespace is found. However, cin.get() reads a string with the whitespace.
    //Space, tab, line feed (newline), carriage return, form feed, and vertical tab characters are called "white-space characters" because they serve the same purpose as the spaces between words and lines on a printed page — they make reading easier.
}